Q: Sentence (1) Stream of consciousness.
Sentence (2) A stream of people emptied from the terminal.. Word: stream.
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A: different meanings

Q: Sentence (1) Do you know my sister?
Sentence (2) She doesn't know this composer.. Word: know.
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A: the same meaning

Q: Sentence (1) During his first year in office.
Sentence (2) He rented an office in the new building.. Word: office.
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A:
different meanings