Do the following sentences say the same thing?
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Singapore shares open 0.31% higher on Monday
Singapore shares open lower on Monday

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Do the following sentences say the same thing?
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A woman is swimming.
A man is singing.

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Do the following sentences say the same thing?
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Along with chipmaker Intel, the companies include Sony Corp., Microsoft Corp., Hewlett-Packard Co., IBM Corp., Gateway Inc. and Nokia Corp.
Along with chip maker Intel, the companies include Sony, Microsoft, Hewlett-Packard, International Business Machines, Gateway, Nokia and others.

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Do the following sentences say the same thing?
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"I don't know if the person I'm talking to now may end up being someone else at another time that may not follow the rules," Parrish said.
"I don't know whether the person I'm talking to now may end up being someone else," Parrish said.
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