Contributo in atti di convegno, 2010,

An Automatically Built Named Entity Lexicon for Arabic

Attia M.; Toral A.; Tounsi L.; Monachini M.; Van Genabith J.

NCLT, School of Computing, Dublin City University, Ireland, ILC-CNR, Pisa

We have successfully adapted and extended the automatic Multilingual, Interoperable Named Entity Lexicon approach to Arabic, using Arabic WordNet (AWN) and Arabic Wikipedia (AWK). First, we extract AWN's instantiable nouns and identify the corresponding categories and hyponym subcategories in AWK. Then, we exploit Wikipedia inter-lingual links to locate correspondences between articles in ten different languages in order to identify Named Entities (NEs). We apply keyword search on AWK abstracts to provide for Arabic articles that do not have a correspondence in any of the other languages. In addition, we perform a post-processing step to fetch further NEs from AWK not reachable through AWN. Finally, we investigate diacritization using matching with geonames databases, MADA-TOKAN tools and different heuristics for restoring vowel marks of Arabic NEs. Using this methodology, we have extracted approximately 45,000 Arabic NEs and built, to the best of our knowledge, the largest Named Entity repository available.

Seventh International Conference on Language Resources and Evaluation, Valletta, Malta

Keywords

Acquisition, Lexicon, database, Named Entity recognition

CNR authors

Monachini Monica

CNR institutes

ILC – Istituto di linguistica computazionale "Antonio Zampolli"