[Q]: Sentence: They champion the talent of the individual and that's what's special about it". Question: According to actor Tom Hiddleston, that is special about Eton?
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[A]: yes

[Q]: Sentence: On the London Underground, a top-contact third rail is beside the track, energized at +420v DC, and a top-contact fourth rail is located centrally between the running rails at 210v DC, which combine to provide a traction voltage of 630v DC. Question: What is the voltage of the return rail?
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[A]: yes

[Q]: Sentence: Selection of an electrification system is based on economics of energy supply, maintenance, and capital cost compared to the revenue obtained for freight and passenger traffic. Question: How do some locomotives function in order to be more flexible in operation?
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[A]:
no