Problem: Although they ran at about the same speed, Sue beat Sally because *she* had such a bad start.
Are "she" and "Sally" the same?
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Answer: yes


Problem: Fred covered his eyes with his hands , because the wind was blowing sand around. He opened *them* when the wind stopped.
Are "them" and "his hands" the same?
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Answer: no


Problem: The sculpture rolled off the shelf because *it* wasn't anchored.
Are "it" and "the shelf" the same?
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Answer:
no