Q: Sentence (1) She's got a perfect smile.
Sentence (2) She had a smile on her face.. Word: smile.
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A: the same meaning

Q: Sentence (1) Defense against hurricanes is an urgent problem.
Sentence (2) He joined the defense against invasion.. Word: defense.
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A: different meanings

Q: Sentence (1) Pull a sled.
Sentence (2) You'll be sent home if you pull another stunt like that.. Word: pull.
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A:
different meanings