Q: There is currently more work on coreference resolution than on chunking because it is a problem that is nearly solved.
Who it is? OPTIONS:
- coreference resolution
- chunking
A: chunking

Q: The United States sanctions Iran since they recently were caught in plotting an assassination.
Who they is? OPTIONS:
- The United States
- Iran
A: Iran

Q: Tom asked his son to drive so that he could sleep.
Who he is? OPTIONS:
- Tom
- his son
A:
Tom