Q: Sentence (1) He turned the box over to examine the bottom side.
Sentence (2) They painted all four sides of the house.. Word: side.
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A: the same meaning

Q: Sentence (1) She was humming an air from Beethoven.
Sentence (2) An air of mystery.. Word: air.
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A: different meanings

Q: Sentence (1) Much of the waste material is carried off in the sewers.
Sentence (2) They collect the waste once a week.. Word: waste.
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A:
the same meaning