Question:
My parents gave the neighbors tickets to Six Flags since they needed them.

they
Answer:
the neighbors
Question:
The squirrels buried the nuts so they would not lose them.

they
Answer:
The squirrels
Question:
The police arrested the criminals since they break the law.

they
Answer:
the criminals
Question:
The plane shot the rocket at the target, then it blew up.

it
Answer:

the target