Q: Sentence (1) I'm leaving work early because I have a doctor's appointment.
Sentence (2) He erred by the appointment of unsuitable men.. Word: appointment.
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A: different meanings

Q: Sentence (1) To club exertions.
Sentence (2) The two men clubbed together.. Word: club.
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A: the same meaning

Q: Sentence (1) The population of New Jersey will not stand for this!
Sentence (2) The African-American population of Salt Lake City has been increasing.. Word: population.
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A:
different meanings