Dr. Diego Moussallem

Senior Researchers

diego.moussallem@uni-paderborn.de

Matrix (Chat)

@diegom:chat.dice-research.org

Phone

+49 5251 605385

Fax

+49 5251 605385

Office

TP6.3.109

My overall background is on CS, but the majority of my career I have spent on NLP. Thus, I have worked on different NLP tasks ranging from basic research in computational linguistics to Entity Linking, Machine Translation, Natural Language Generation, and Question Answering. My work resulted in the first neural machine translation model augmented with knowledge graphs and one state-of-the-art framework in respect of multilingualism and knowledge-graph-based algorithms. Additionally, I contribute actively to the scientific community, being responsible for the Portuguese chapter of DBpedia as well as mentoring students at the Google Summer of Code. I am currently a senior NLP research scientist, leading the NLP team, in the DICE research group at Paderborn University. Previously, I was a researcher at AKSW (Leipzig, DE), working on Information Retrieval and NLP. I hold an MSc. and a Ph.D.

Speaking hours: Write an e-mail to make an appointment before coming to the office. Otherwise, it is possible that I either won't have time for you or that I am not in the office (even throughout the speaking hours).

Member and Reviewer at:

International Conference on Knowledge Capture (KCAP) 2017, 2019
Conference on Empirical Methods in Natural Language Processing (EMNLP) 2019
Conference of the North American Chapter of the Association for Computational Linguistics (NAACL) 2019
Annual Meeting of the Association for Computational Linguistics (ACL) 2018, 2019, 2020
International Conference on Natural Language Generation (INLG) 2018, 2019
International Conference on Computational Linguistics (COLING) 2016
Extended Semantic Web Conference (ESWC) 2016, 2020
Journal of Web Semantics
Semantic Web Journal
Journal on Semantic Web and Information Systems.
Artificial Intelligence Review

Projects

DAIKIRI – Diagnostische KI für industrielle Daten DIESEL – Distributed Search in Large Enterprise Data Evaluating entity annotators using GERBIL – HOBBIT – Holistic Benchmarking of Big Linked Data KnowGraphs – Knowledge Graphs at Scale LIMBO – Linked Data Services for Mobility LOLA – An Open-Source Massively Multilingual Large Language Model PORQUE – Polylingual Hybrid Question Answering QAMEL – Question Answering on Mobil Devices RAKI – Rapide XAI for Industrial Plants SOLIDE – Sprachgesteuerte, kontextuelle Lagebildinformation für Stäbe und Einsatzkräfte im Bevölkerungsschutz SPEAKER – SPEAKER: Eine Sprachassistenzplattform »Made in Germany«

Publications

Contextual Augmentation for Entity Linking using Large Language Models

By Daniel Vollmers, Hamada M. Zahera, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

COLING 2025, 2025, #article

Multilingual Relation Extraction: A Survey

By Manzoor Ali, René Speck, Hamada M. Zahera, Muhammad Saleem, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

IEEE Access, 2025, #article

LOLA - An Open-Source Massively Multilingual Large Language Model

By Nikit Srivastava, Denis Kuchelev, Tatiana Moteu Ngoli, Kshitij Shetty, Michael Röder, Hamada M. Zahera, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

Proceedings of the 31st International Conference on Computational Linguistics, COLING 2025, Abu Dhabi, UAE, January 19-24, 2025, 2025, #inproceedings

AutoCL: AutoML for Concept Learning

By Jiayi Li, Sheetal Satheesh, Stefan Heindorf, Diego Moussallem, René Speck, Axel-Cyrille Ngonga Ngomo

Explainable Artificial Intelligence, 2024, #inproceedings

Enhancing Relation Extraction Through Augmented Data: Large Language Models Unleashed

By Manzoor Ali, Muhammad Sohail Nisar, Muhammad Saleem, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

NLDB24, 2024, #inproceedings

Benchmarking Low-Resource Machine Translation Systems

By Ana Silva, Nikit Srivastava, Tatiana Moteu Ngoli, Michael Röder, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

Proceedings of the The Seventh Workshop on Technologies for Machine Translation of Low-Resource Languages (LoResMT 2024), 2024, #inproceedings

MST5 -- Multilingual Question Answering over Knowledge Graphs

By Nikit Srivastava, Mengshi Ma, Daniel Vollmers, Hamada Zahera, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

To appear, 2024, #article

UniQ-Gen: Unified Query Generation across Multiple Knowledge Graphs

By Daniel Vollmers, Nikit Srivastava, Hamada M. Zahera, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

EKAW 2024, 2024, #inproceedings

Generating SPARQL from Natural Language Using Chain-of-Thoughts Prompting

By Hamada M. Zahera, Manzoor Ali, Mohamed Ahmed Sherif, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

Knowledge Graphs in the Age of Language Models and Neuro-Symbolic AI - Proceedings of the 20th International Conference on Semantic Systems (SEMANTiCS), 17-19 September 2024, Amsterdam, The Netherlands, 2024, #inproceedings

Lingua Franca - Entity-Aware Machine Translation Approach for Question Answering over Knowledge Graphs

By Nikit Srivastava, Aleksandr Perevalov, Denis Kuchelev, Diego Moussallem, Axel-Cyrille Ngonga Ngomo, Andreas Both

Proceedings of the 12th Knowledge Capture Conference 2023, K-CAP 2023, Pensacola, FL, USA, December 5-7, 2023, 2023, #inproceedings

RELD: A Knowledge Graph of Relation Extraction Datasets

By Manzoor Ali, Muhammad Saleem, Diego Moussallem, Mohamed Ahmed Sherif, Axel-Cyrille Ngonga Ngomo

ESWC, 2023, #inproceedings

CovidPubGraph: A FAIR Knowledge Graph of COVID-19 Publications

By Svetlana Pestryakova, Daniel Vollmers, Mohamed Ahmed Sherif, Stefan Heindorf, Muhammad Saleem, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

Scientific Data, 2022, #article

Proposal for PORQUE, a Polylingual Hybrid Question Answering System

By Victor Mireles, Artem Revenko, Nikit Srivastava, Daniel Vollmers, Anna Breit, Diego Moussallem

Proceedings of Poster and Demo Track and Workshop Track of the 18th International Conference on Semantic Systems, co-located with 18th International Conference on Semantic Systems (SEMANTiCS 2022), 2022, #inproceedings

Convolutional Hypercomplex Embeddings for Link Prediction

By Caglar Demir, Diego Moussallem, Stefan Heindorf, Axel-Cyrille Ngonga Ngomo

Asian Conference on Machine Learning, 2021, #inproceedings

GATES: Using Graph Attention Networks for Entity Summarization

By Asep Fajar Firmansyah, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

K-CAP '21: Proceedings of the 11th Knowledge Capture Conference, 2021, #inproceedings

Knowledge Graph Question Answering using Graph-Pattern Isomorphism

By Daniel Vollmers, Rricha Jalota, Diego Moussallem, Hardik Topiwala, Axel-Cyrille Ngonga Ngomo, Ricardo Usbeck

SEMANTiCS 2021, 2021, #article

LAUREN - Knowledge Graph Summarization for Question Answering

By Rricha Jalota, Daniel Vollmers, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

Proceedings of the 15th IEEE International Conference on Semantic Computing (ICSC 2021), 2021, #inproceedings

Multilingual Verbalization and Summarization for Explainable Link Discovery

By Abdullah Fathi Ahmed, Mohamed Ahmed Sherif, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

Data & Knowledge Engineering, 2021, #article

Towards holistic Entity Linking: Survey and directions

By Italo Lopes Oliveira, Renato Fileto, René Speck, Lu\'ıs Paulo F. Garcia, Diego Moussallem, Jens Lehmann

Information Systems, 2021, #article

Twitter Network Mimicking for Data Storage Benchmarking

By René Speck, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

Proceedings of the 15th IEEE International Conference on Semantic Computing (ICSC), 2021, #inproceedings

A shallow neural model for relation prediction

By Caglar Demir, Diego Moussallem, Axel-Cyrille Ngonga Ngomo

Proceedings of the 15th IEEE International Conference on Semantic Computing (ICSC 2021), 2021, #inproceedings

Where is Linked Data in Question Answering over Linked Data?

By Tommaso Soru, Edgard Marx, André Valdestilhas, Diego Moussallem, Gustavo Publio, Muhammad Saleem

arXiv preprint arXiv:2005.03640, 2020, #article

A General Benchmarking Framework for Text Generation

By Diego Moussallem, Paramjot Kaur, Thiago Ferreira, Chris van der Lee, Anastasia Shimorina, Felix Conrads, Michael Röder, René Speck, Claire Gardent, Simon Mille, Nikolai Ilinykh, Axel-Cyrille Ngonga Ngomo

Proceedings of the 3rd International Workshop on Natural Language Generation from the Semantic Web (WebNLG+), 2020, #inproceedings

Generating Explanations in Natural Language from Knowledge Graphs

By Diego Moussallem, René Speck, Axel-Cyrille Ngonga Ngomo

Knowledge Graphs for eXplainable Artificial Intelligence: Foundations, Applications and Challenges, 2020, #article

NABU - Multilingual Graph-Based Neural RDF Verbalizer

By Diego Moussallem, Dwaraknath Gnaneshwar, Thiago Castro Ferreira, Axel-Cyrille Ngonga Ngomo

The Semantic Web - ISWC 2020 - 19th International Semantic Web Conference, Athens, Greece, November 2-6, 2020, Proceedings, Part I, 2020, #inproceedings

OPTIC: A Deep Neural Network Approach for Entity Linking using Word and Knowledge Embeddings

By Italo Lopes Oliveira, Diego Moussallem, Lu\'ıs Paulo Faina Garcia, Renato Fileto

Proceedings of the 22nd International Conference on Enterprise Information Systems, ICEIS 2020, Prague, Czech Republic, May 5-7, 2020, Volume 1, 2020, #inproceedings

A Holistic Natural Language Generation Framework for the Semantic Web

By Axel-Cyrille Ngonga Ngomo, Diego Moussallem, Lorenz Bühman

Proceedings of the International Conference Recent Advances in Natural Language Processing, 2019, #inproceedings

Offline Question Answering over Linked Data using Limited Resources

By Paramjot Kaur, Vincent Blücher, Rricha Jalota, Diego Moussallem

SEMANTiCS, 2019, #inproceedings

Utilizing Knowledge Graphs for Neural Machine TranslationAugmentation

By Diego Moussallem, Axel-Cyrille Ngonga Ngomo, Paul Buitelaar, Mihael Arcan

K-CAP 2019: Knowledge Capture Conference, 2019, #inproceedings

Semantic Web for Machine Translation: Challenges and Directions

By Diego Moussallem, Matthias Wauer, Axel-Cyrille Ngonga Ngomo

International Semantic Web Conference, 2019, #inproceedings

THOTH: Neural Translation and Enrichment of Knowledge Graphs

By Diego Moussallem, Tommaso Soru, Axel-Cyrille Ngonga Ngomo

International Semantic Web Conference, 2019, #inproceedings

Neural Machine Translation for Query Construction and Composition

By Tommaso Soru, Edgard Marx, André Valdestilhas, Diego Esteves, Diego Moussallem, Gustavo Publio

ICML Workshop on Neural Abstract Machines & Program Induction (NAMPI v2), 2018, #inproceedings

LIdioms: A Multilingual Linked Idioms Data Set

By Diego Moussallem, Mohamed Ahmed Sherif, Diego Esteves, Marcos Zampieri, Axel-Cyrille Ngonga Ngomo

The 11th edition of the Language Resources and Evaluation Conference, 7-12 May 2018, Miyazaki (Japan), 2018, #inproceedings

Entity Linking in 40 Languages using MAG

By Diego Moussallem, Ricardo Usbeck, Michael Röder, Axel-Cyrille Ngonga Ngomo

The Semantic Web, ESWC 2018, Lecture Notes in Computer Science, 2018, #inproceedings

Enriching the WebNLG corpus

By Thiago Castro Ferreira, Diego Moussallem, Emiel Krahmer, Sander Wubben

Proceedings of the 11th International Conference on Natural Language Generation, 2018, #inproceedings

RDF2PT: Generating Brazilian Portuguese Texts from RDF Data

By Diego Moussallem, Marcos Zampieri Thiago Castro Ferreira, Maria Claudia Cavalcanti, Geraldo Xexéo, Mariana Neves, Axel-Cyrille Ngonga Ngomo

The 11th edition of the Language Resources and Evaluation Conference, 7-12 May 2018, Miyazaki (Japan), 2018, #inproceedings

NeuralREG: An end-to-end approach to referring expression generation

By Thiago Castro Ferreira, Diego Moussallem, Ákos Kádár, Sander Wubben, Emiel Krahmer

Proceedings of the 55th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), 2018, #inproceedings

Machine Translation using Semantic Web Technologies: A Survey

By Diego Moussallem, Matthias Wauer, Axel-Cyrille Ngonga Ngomo

Journal of Web Semantics, 2018, #article

BENGAL: An Automatic Benchmark Generator for Entity Recognition and Linking

By Axel-Cyrille Ngonga Ngomo, Michael Röder, Diego Moussallem, Ricardo Usbeck, René Speck

Proceedings of the 11th International Conference on Natural Language Generation, Tilburg University, The Netherlands, November 5-8, 2018, 2018, #inproceedings

SPARQL as a Foreign Language

By Tommaso Soru, Edgard Marx, Diego Moussallem, Gustavo Publio, André Valdestilhas, Diego Esteves, Ciro Baron Neto

Proceedings of the 13th International Conference on Semantic Systems - SEMANTiCS2017 Posters and Demos, 2017, #inproceedings

TANKER: Distributed Architecture for Named Entity Recognition and Disambiguation

By Sandro Athaide Coelho, Diego Moussallem, Gustavo Correa Publio, Diego Esteves

13th International Conference on Semantic Systems Proceedings (SEMANTiCS 2017) - Posters & Demonstrations Track, 2017, #inproceedings

LOG4MEX: A Library to Export Machine Learning Experiments

By Diego Esteves, Diego Moussallem, Tommaso Soru, Ciro Baron Neto, Jens Lehmann, Axel-Cyrille Ngonga Ngomo, Julio Cesar Duarte

WI '17 - IEEE/WIC/ACM International Conference on Web Intelligence, 2017, #inproceedings

MAG: A Multilingual, Knowledge-base Agnostic and Deterministic Entity Linking Approach

By Diego Moussallem, Ricardo Usbeck, Michael Röder, Axel-Cyrille Ngonga Ngomo

K-CAP 2017: Knowledge Capture Conference, 2017, #inproceedings

GENESIS -- A Generic RDF Data Access Interface

By Timofey Ermilov, Diego Moussallem, Ricardo Usbeck, Axel-Cyrille Ngonga Ngomo

WI '17 - IEEE/WIC/ACM International Conference on Web Intelligence, 2017, #inproceedings

DBtrends : Exploring Query Logs for Ranking RDF Data

By Edgard Marx, Amrapali Zaveri, Diego Moussallem, Sandro Rautenberg

Proceedings of the 12th International Conference on Semantic Systems, 2016, #inproceedings

MEX Interfaces: Automating Machine Learning Metadata Generation

By Diego Esteves, Pablo N. Mendes, Diego Moussallem, Julio Cesar Duarte, Amrapali Zaveri, Jens Lehmann, Ciro Baron Neto, Igor Costa, Maria Claudia Cavalcanti

12th International Conference on Semantic Systems (SEMANTiCS 2016), 12-15 September 2016, Leipzig, Germany, 2016, #inproceedings

WASOTA: What are the states of the art?

By Ciro Baron Neto, Diego Esteves, Tommaso Soru, Diego Moussallem, Andre Valdestilhas, Edgard Marx

12th International Conference on Semantic Systems (SEMANTiCS 2016), 12-15 September 2016, Leipzig, Germany (Posters & Demos), 2016, #inproceedings

MEX Vocabulary: A Lightweight Interchange Format for Machine Learning Experiments

By Diego Esteves, Diego Moussallem, Ciro Baron Neto, Tommaso Soru, Ricardo Usbeck, Markus Ackermann, Jens Lehmann

11th International Conference on Semantic Systems (SEMANTiCS 2015), 15-17 September 2015, Vienna, Austria, 2015, #inproceedings

Interoperable Machine Learning Metadata using MEX.

By Diego Esteves, Diego Moussallem, Ciro Baron Neto, Jens Lehmann, Maria Claudia Cavalcanti, Julio Cesar Duarte

14th International Semantic Web Conference (ISWC 2015), 11-15 October 2015, Bethlehem, Pennsylvania, USA (Posters & Demos), 2015, #inproceedings

Using Ontology-Based Context in the Portuguese-English Translation of Homographs in Textual Dialogues

By Diego Moussallem, Ricardo Choren

International Journal of Artificial Intelligence & Applications (IJAIA), 2015, #article