Question:
Amazon offers a generous credit program for college books because they want students to come back and use their credit for more purchases.

Who is they referring to in this sentence?
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Answer:
Amazon

Question:
Uncharted 3 did not introduce any new ideas since their last game, Uncharted 2, but it is still going to be a fun game.

Who is it referring to in this sentence?
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Answer:
Uncharted 2

Question:
Black Eyed Peas hosted a huge event for the partners of Intel, since they have lots of money to hire them to perform.

Who is they referring to in this sentence?
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Answer:
the partners of Intel

Question:
The airline unions constantly go on strike against the airlines because they do not care for the employees.

Who is they referring to in this sentence?
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Answer:
the airlines