Question:
Caesar the ape found out the door code by watching Morris, so he was able to escape.

Who is he referring to in this sentence?
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Answer:
Caesar the ape

Question:
The Secretary and the President met about him being elected.

Who is him referring to in this sentence?
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Answer:
the President

Question:
Taco needs hot sauce because it does not taste as good alone.

Who is it referring to in this sentence?
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Answer:
Taco

Question:
John visited his son so he would feel loved.

Who is he referring to in this sentence?
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Answer:
his son