Time: 1245pm-145pm, Friday, April 23 Place: Room 6496, CUNY Graduate Center, 365 Fifth Ave (34str&35str). Speaker: Prof. Satoshi Sekine (NYU) Title: "On-Demand Information Extraction and Knowledge Discovery" Abstract: At present, adapting an Information Extraction system to new topics is an expensive and slow process, requiring some knowledge engineering for each new topic. We propose a new paradigm of Information Extraction which operates 'on demand' in response to a user's query. On-demand Information Extraction (ODIE) aims to completely eliminate the customization effort. Given a user's query, the system will automatically create patterns to extract salient relations in the text of the topic, and build tables from the extracted information using paraphrase discovery technology. It relies on recent advances in pattern discovery, paraphrase discovery, and extended named entity tagging. I will show you a demo system, which produce a table in less than a minute for any give queries. I will also explain the need of linguistic knowledge and introduce some weakly supervised learning methods. I will show a demo of the ngram search engine, which extracts ngrams and sentences which match to a query with arbitrary wildcard. Also, I will give a brief introduction about the Web People Search. It is a task to disambiguate search results of people name and people attribute extraction task. We organized WePS1 and 2, and currently started the third evaluation, which includes 2 tasks: 1) the combined task of people disambiguation and attribute extraction and 2) organization disambiguation from twitter messages. Speaker's bio: Satoshi Sekine is an Research Associate Professor at New York University. He received his MSc at UMIST, UK in 1992 and his PhD in 1998 at NYU. He has been working on various topics, including parsing, NE, Information Extraction and minimally supervised knowledge discovery. He edited a book about NE from John Benjamins, organized a JHU summer workshop 2009, WePS task, NSF symposium on Semantic Knowledge Discovery, Organization and Use in 2008, workshop on Textual Entailment and Parsing 2007.