Rate the similarity of the following two sentences
Whistleblower Edward Snowden flies to Moscow
NSA whistleblower Edward Snowden leaves Hong Kong on flight to Moscow

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Rate the similarity of the following two sentences
The procedure is generally performed in the second or third trimester.
The technique is used during the second and, occasionally, third trimester of pregnancy.

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Rate the similarity of the following two sentences
World powers, Iran under Rouhani revive nuclear talks
World powers seek rare progress in Iran nuclear talks

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