[Q]: Sentence: According to Giovanni Zinn of the city's Office of Sustainability, each fuel cell may save the city up to $1 million in energy costs over a decade. Question: In terms of budget, what is the estimated savings from using the fuel cell system?
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[A]: yes

[Q]: Sentence: The Portuguese currency is the euro (), which replaced the Portuguese Escudo, and the country was one of the original member states of the eurozone. Question: What currency does Portugal use?
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[A]: yes

[Q]: Sentence: Examples of this kind of wood are alder, basswood,[citation needed] birch, buckeye, maple, willow,and the Populus species such as aspen, cottonwood and poplar. Question: What species do aspen, cottonwood, and poplar trees belong to?
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[A]:
yes