Event and Time yw sun, hao zhang

时间识别与标准化: SUTime — 基于规则的方法 需要设置基准时间 规则不适用于故事型文本 时间描述识别不完整 一些错误 one day - DURATION/DATE？ once - Time or not？ the next morning, Value : 2017-04-20TMO 解决方法 修改规则 加入机器学习方法 http://nlp.stanford.edu:8080/sutime/

WN-Verb 在MCTest统计结果 30 1310 / 1308 1104 / 1027 70 3024 / 3022 数据集 数量 POS-VB / WN-Verb标注 事件数量 / WN-Verb标注 MC160-DEV 30 1310 / 1308 1104 / 1027 MC160-Train 70 3024 / 3022 2534 / 2378 MC160-Test 60 2594 / 2591 2191 / 2061 MC500-DEV 50 2301 / 2298 1936 / 1835 MC500-Train 300 13697 / 13690 11443 / 10783 MC500-Test 150 6585 / 6578 5505 / 5165

Aspectual Classes Stative 种类 说明 特性 例子 Telic Dynamic Durative Stative Describe some property of the world that can hold for extend indefinitely - + I believe …. , He loves dog , know, have Activity Describe activities that occur over an interval of time Drive a car , John walked Achievement Describe a transition only woke up, closed the door , won the race Accomplishment Involve some activity leading up to the culmination recognized the man , ran to the store

从Event Structure角度看Aspectual Classes Preparatory Culmination Consequent Stative Activity Achievement Accomplishment 那么是否可以把Verb表示成Event Structure? A tri-partite event structure Example: ”run”: have a preparatory, but no culmination or consequent

Semantic Predicates Semantic predicates denote the relations between participants and events. They are used to convey the meaning for verb class. A time function //describing for which part in the event the semantic predicate holds true event (E): all times start(E) during(E): preparatory end(E): culmination result(E): consequent Aspect in VerbNet is captured by time function present in the predicates Stative, the whole event (E). Activities, only have during(E). Achievement, have end(E),result(E)? Accomplishments, have during(E), end(E),result(E)? put-9.1-2 like the creation verbs, the event variable E or a subpart of it (start(E), during(E), end(E), result(E)), describing for which part in the event the semantic predicate holds true. In order to capture aspectual characteristics, run put Thanks, Any Questions?