Necati Ercan Ozgencil

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This paper describes the retrieval experiments for the main task and list task of the TREC-10 question-answering track. The question answering system described automatically finds answers to questions in a large document collection. The system uses a two-stage retrieval approach to answer finding based on matching of named entities, linguistic patterns, and(More)
The semantic role labels of verb predicates can be used to define an event model for understanding text. In the system described in this paper, the events are extracted from documents that are summary reports about individual people. The system constructed for the event extraction integrates a statistical approach using machine learning over Propbank(More)
This article explores new methods for gathering and analyzing spatially rich demographic data using mobile phones. It describes a pilot study (the Human Mobility Project) in which volunteers around the world were successfully recruited to share GPS and cellular tower information on their trajectories and respond to dynamic, location-based surveys using an(More)
This paper describes the retrieval experiments for the main task and list task of the TREC-2002 question-answering track. The question answering system described automatically finds answers to questions in a large document collection. The system uses a two-stage retrieval approach to answer finding based on matching of named entities, linguistic patterns,(More)
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