Question:
Jackie gave Beth a present because it was her friend's birthday.

Who is her referring to in this sentence?
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Answer:
Jackie

Question:
Johnson wanted to make friendship with David, because he wanted help.

Who is he referring to in this sentence?
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Answer:
Johnson

Question:
Kenny attacked Ben, and then he attacked back.

Who is he referring to in this sentence?
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Answer:
Ben

Question:
Dad yelled at Sam because he did not go to school.

Who is he referring to in this sentence?
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Answer:
Sam