Q: Sentence (1) A branch of Congress.
Sentence (2) He broke off one of the branches.. Word: branch.
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A: different meanings

Q: Sentence (1) Normalize relations with China.
Sentence (2) There is little hope that the two countries will normalize relations; their governments seem to hate each other and would just as soon stay on bad terms.. Word: normalize.
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A: the same meaning

Q: Sentence (1) A peach stone.
Sentence (2) You should remove the stones from prunes before cooking.. Word: stone.
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A:
the same meaning