Researcher:
Akdemir, Arda

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Arda

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Akdemir

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Akdemir, Arda

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2018 - 20192

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Researcher Of Publications: search.filters.isAuthorOfPublication.56ff022b-d6bc-455e-95ce-cb7a597a950e

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    PublicationOpen Access
    Towards generalizable place name recognition systems: analysis and enhancement of NER systems on English news from India
    (Association for Computing Machinery (ACM), 2018) Department of Sociology; Department of Computer Engineering; Akdemir, Arda; Hürriyetoğlu, Ali; Yörük, Erdem; Gürel, Burak; Yoltar, Çağrı; Yüret, Deniz; Researcher; Teaching Faculty; Faculty Member; Faculty Member; Researcher; Faculty Member; Department of Sociology; Department of Computer Engineering; Graduate School of Social Sciences and Humanities; Graduate School of Sciences and Engineering; N/A; N/A; 28982; 219277; N/A; 179996
    Place name recognition is one of the key tasks in Information Extraction. In this paper, we tackle this task in English News from India. We first analyze the results obtained by using available tools and corpora and then train our own models to obtain better results. Most of the previous work done on entity recognition for English makes use of similar corpora for both training and testing. Yet we observe that the performance drops significantly when we test the models on different datasets. For this reason, we have trained various models using combinations of several corpora. Our results show that training models using combinations of several corpora improves the relative performance of these models but still more research on this area is necessary to obtain place name recognizers that generalize to any given dataset.
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    PublicationOpen Access
    Overview of CLEF 2019 lab protestnews: extracting protests from news in a cross-context setting
    (Springer, 2019) Department of Sociology; Department of Computer Engineering; Hürriyetoğlu, Ali; Yörük, Erdem; Yüret, Deniz; Yoltar, Çağrı; Gürel, Burak; Mutlu, Osman; Akdemir, Arda; Teaching Faculty; Faculty Member; Faculty Member; Researcher; Faculty Member; Researcher; Department of Sociology; Department of Computer Engineering; Graduate School of Social Sciences and Humanities; Graduate School of Sciences and Engineering; N/A; 28982; 179996; N/A; 219277; N/A; N/A
    We present an overview of the CLEF-2019 Lab ProtestNews on Extracting Protests from News in the context of generalizable natural language processing. The lab consists of document, sentence, and token level information classification and extraction tasks that were referred as task 1, task 2, and task 3 respectively in the scope of this lab. The tasks required the participants to identify protest relevant information from English local news at one or more aforementioned levels in a cross-context setting, which is cross-country in the scope of this lab. The training and development data were collected from India and test data was collected from India and China. The lab attracted 58 teams to participate in the lab. 12 and 9 of these teams submitted results and working notes respectively. We have observed neural networks yield the best results and the performance drops significantly for majority of the submissions in the cross-country setting, which is China.