[Q]: Missing plane search turns to Vietnamese islands
Missing Malaysia Airlines plane 'crashes off Vietnam'

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[A]: 3

[Q]: A red double decker bus on a crowded street.
A white bus partially in the snow on a public street.

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[A]: 2

[Q]: N Korea warns of retaliation for South Korea drill
North warns of retaliation for Seoul's naval drill plan

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[A]:
4