QUES:
Who is they in the following sentence?

The citizens rebelled against the government because they were being repressed.

ANS:
The citizens

QUES:
Who is he in the following sentence?

Jacob gave William money because he sold the car.

ANS:
Jacob

QUES:
Who is they in the following sentence?

Intel sued IntelSpec since they happen to have a trademarked brand in their company name.

ANS:
IntelSpec