QUESTION:
People like dogs but they do not like cats.
Who is "they"?

ANS:
People

QUESTION:
The students fell asleep during the professor's lectures because they were bored.
Who is "they"?

ANS:
The students

QUESTION:
The employees of Six Flags denied the customers access to the ride, but they can still go on other rides.
Who is "they"?

ANS:
the customers

QUESTION:
Dan modified Harry's car because he had the tools.
Who is "he"?

ANS:
Dan