Who is they?
Some people proclaimed at the Ontario conventions that we need to colonize planets in the near future because they think we may face extinction if Aliens ever came for our resources.

OPTIONS:
- Some people
- the Ontario conventions

A:
Some people

Who is he?
Jacob gave William money because he needed some.

OPTIONS:
- Jacob
- William

A:
William

Who is they?
The sailors fell off the boats because they were capsizing.

OPTIONS:
- The sailors
- the boats

A:
the boats