Dr. Yaser Oulabi

Ph.D.
University of Mannheim

M.Sc. Business Informatics
B.Sc. Business Management
University of Mannheim

yaser (at) informatik.uni-mannheim.de

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My research is on the expansion of cross-domain knowledge base using structured web data. In my research I focus on the tasks of Long-Tail Entity Extraction and Time-Dependent Data Fusion to augment knowledge bases like DBpedia or Wikidata using web table corpora provided by the Web Data Commons Project.

Research

Research Interests

Knowledge Base Completion
Web Table Data Consolidation
Long-Tail Entity Extraction
Time-Dependent Web Data Fusion
Weak Supervision

Datasets & Code

Time-Dependent Ground-Truth Dataset
Dataset - Ground truth of time-dependet data from various domains. The dataset allows the development and evaluation of methods dealing with time-dependent data.
Web Tables for Long-Tail Entity Extraction
Dataset - Gold standard for evaluating the extraction of long-tail entities from web tables. The dataset was built with the motivation of augmenting a cross-domain knowledge base with previously unknown entities from web data.
Extracting Long Tail Entities from Web Tables for Augmenting Cross-Domain Knowledge Bases
Code/Project - Code and instructions on replicating our research on the extraction of new long-tail entities from web tables and the use of weak supervision approaches.
Time-Aware Fusion for Web Table Data
Code/Project - Code and instructions on replicating our research on the fusion of time-dependent data from web tables.

Publications

Yaser Oulabi (2020). Augmenting cross-domain knowledge bases using web tables. Dissertation. University of Mannheim, Mannheim, Germany.
Yaser Oulabi and Christian Bizer (2019). Using weak supervision to identify long-tail entities for knowledge base completion. In: 15th International Conference on Semantic Systems, SEMANTiCS 2019, Karlsruhe, Germany, September 9 - 12, 2019.
Yaser Oulabi and Christian Bizer (2019). Extending cross-domain knowledge bases with long tail entities using web table data. In: 22nd International Conference on Extending Database Technology, EDBT 2019, Lisbon, Portugal, March 26-29, 2019.
Yaser Oulabi and Christian Bizer (2017). Estimating missing temporal meta-information using Knowledge-Based-Trust. In: 3rd International Workshop on Knowledge Discovery on the WEB Cagliari, KDWeb 2017, Italy, September 11 to 12, 2017.
Yaser Oulabi, Robert Meusel and Christian Bizer (2016). Fusing time-dependent web table data. In: 9th International Workshop on Web and Databases, WebDB 2019,, San Francisco, CA, USA, June 26, 2016 : co-located with ACM SIGMOD 2016 (S. Article 3, 1-7). , ACM: New York, NY.
Dominique Ritze, Oliver Lehmberg, Yaser Oulabi and Christian Bizer (2016). Profiling the potential of web tables for augmenting cross-domain knowledge bases. In: 25th International Conference on World Wide Web, WWW 2016, Montreal, Canada, April 11 - 15, 2016.

Personal Life

Alumni holder of a scolarship by Avicenna-Studienwerk e.V.
Initiator and project manager of the first "1. Juli - Tag gegen antimuslimsichen Rassismus" [Frankfurter Rundschau, islam.de], a project now coordinated by CLAIM Allianz (part of Junge Islam Konferenz) and supported by the Bundesfamilienministerium für Familie, Senioren, Frauen und Jugend.
Former vice president of RAMSA e.V.
Former president of MHG Mannheim e.V. [Mannheimer Morgen]

Last update: 29.11.2020