Who is he?
Knight Commander Roddick was plagued by a vision of his dead son because he was killed due to a lack of protection from his father.

OPTIONS:
- Knight Commander Roddick
- his dead son

A:
his dead son

Who is it?
There is more NLP work on English than on Bengali because it has little linguistic resources.

OPTIONS:
- English
- Bengali

A:
Bengali

Who is they?
The graduate students spend every waking moment studying for their classes since they offer much knowledge and tests as part of their itinerary.

OPTIONS:
- The graduate students
- their classes

A:
their classes