Who is they?
The Roman legion attacked the Persians because they felt threatened.

OPTIONS:
- The Roman legion
- the Persians

A:
The Roman legion

Who is it?
The sword was stuck in the tree because it was wedged in there really well.

OPTIONS:
- The sword
- the tree

A:
The sword

Who is they?
The pilots saved the passengers because they begged them to.

OPTIONS:
- The pilots
- the passengers

A:
the passengers