1. Event and Time
yw sun, hao zhang

2. 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 :  TMO
解决方法
修改规则
加入机器学习方法

3. 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

4. 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

5. 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

6. 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?