Q: Sentence (1) Tickets are $5 per head.
Sentence (2) He is two heads taller than his little sister.. Word: head.
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A: different meanings

Q: Sentence (1) The hunters found deer sign at the end of the trail.
Sentence (2) They welcomed the signs of spring.. Word: sign.
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A: the same meaning

Q: Sentence (1) Gather some stones.
Sentence (2) The teacher gathered the kids together.. Word: gather.
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A:
the same meaning