刘康：开放域环境下文本事件抽取.pdf

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Open Domain Event Extraction from Texts Institute of Automation, Chinese Academy of Sciences Kang Liu 2017.12.14

Texts to Knowledge Knowledge Texts

Entity-Centric Knowledge Graph (Barack Obama, Spouse, Michelle Obama) Head Entity Relation Tail Entity

Event-Centric Knowledge Graph In 1961, moved to University of Washington for a year. Person: Obama Time: 1961 Place: Honolulu, Hawaii Obama was born on August 4, 1961 Honolulu, Hawaii. Temporal relation from 2009 to 2017. Obama, served as president of United states Obama issued executive orders and… ..… Person: Obama Time: 2009-2017 Position: President of USA military drawdow n in Iraq. Birth • birth date • birth place • name Marriage • date • location • male • female EndPosition • time • company • position Earthquake • date • magnitude • depth • casualties • epicenter Attack • location • time • casualties • attacker • target Acquisition • amount • seller • buyer • time Event Frame (Script)

Extract Events from Texts Barry Diller on Wednesday quit as chief of Vivendi Universal Entertainment. Trigger Arguments Quit (a “Personnel/End-Position” event) Barry Diller Role = Person Role = Organization Vivendi Universal Entertainment Role = Position Role = Time-within Chief Wednesday (2003-03-04)

Extract Events from Texts Organization Barry Diller on Wednesday quit as chief of Vivendi Universal Entertainment. Trigger Words Arguments Words Trigger Arguments Quit (a “Personnel/End-Position” event) Barry Diller Role = Person Role = Organization Vivendi Universal Entertainment Role = Position Role = Time-within Chief Wednesday (2003-03-04)

Extract Events from Texts Person Time Organization Position Barry Diller on Wednesday quit as chief of Vivendi Universal Entertainment. Trigger Words Arguments Words Trigger Arguments Quit (a “Personnel/End-Position” event) Barry Diller Role = Person Role = Organization Vivendi Universal Entertainment Role = Position Role = Time-within Chief Wednesday (2003-03-04)

Task Deﬁnition • Deﬁnition (ACE) • An event is deﬁned as a speciﬁc occurrence involving participants. • Event trigger, Event Type, Event argument, Argument role Barry Diller on Wednesday quit as chief of Vivendi Universal Entertainment. Trigger Arguments Quit (a “Personnel/End-Position” event) Role = Person Barry Diller Role = Organization Vivendi Universal Entertainment 3/ 27 Role = Position Chief Role = Time-within Wednesday (2003-03-04) 1. Event Identiﬁcation (Trigger Words) 2. Event Type Identiﬁcation 3. Argument Identiﬁcation 4. Argument Role Identiﬁcation

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