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Article Details

Copyright Statement: This is an open access article licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, even commercially as long as the original work is properly cited.

Named Entity Recognition System for Postpositional Languages: Urdu as a Case Study

Author 1: Muhammad Kamran Malik
Author 2: Syed Mansoor Sarwar

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Digital Object Identifier (DOI) : 10.14569/IJACSA.2016.071019

Article Published in International Journal of Advanced Computer Science and Applications(IJACSA), Volume 7 Issue 10, 2016.

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Abstract: Named Entity Recognition and Classification is the process of identifying named entities and classifying them into one of the classes like person name, organization name, location name, etc. In this paper, we propose a tagging scheme Begin Inside Last -2 (BIL2) for the Subject Object Verb (SOV) languages that contain postposition. We use the Urdu language as a case study. We compare the F-measure values obtained for the tagging schemes IO, BIO2, BILOU and BIL2 using Hidden Markov Model (HMM) and Conditional Random Field (CRF). The BIL2 tagging scheme results are better than the other three tagging schemes using the same parameters including bigram and context window. With HMM, the F-measure values for IO, BIO2, BILOU, and BIL2 are 44.87%, 44.88%, 45.14%, and 45.88%, respectively. With CRF, the F-measure values for IO, BIO2, BILOU, and BIL2 are 35.13%, 35.90%, 37.85%, and 38.39%, respectively. The F-measure values for BIL2 are better than those of previously reported techniques

Keywords: IOB tagging; BIO tagging; BILOU tagging; IOE tagging; BIL2 tagging; NER for Resource-poor languages

Muhammad Kamran Malik and Syed Mansoor Sarwar, “Named Entity Recognition System for Postpositional Languages: Urdu as a Case Study” International Journal of Advanced Computer Science and Applications(IJACSA), 7(10), 2016. http://dx.doi.org/10.14569/IJACSA.2016.071019

@article{Malik2016,
title = {Named Entity Recognition System for Postpositional Languages: Urdu as a Case Study},
journal = {International Journal of Advanced Computer Science and Applications},
doi = {10.14569/IJACSA.2016.071019},
url = {http://dx.doi.org/10.14569/IJACSA.2016.071019},
year = {2016},
publisher = {The Science and Information Organization},
volume = {7},
number = {10},
author = {Muhammad Kamran Malik and Syed Mansoor Sarwar}
}


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