[Q]: Sentence: By the beginning of the 20th century, the trans-Saharan trade had clearly declined because goods were moved through more modern and efficient means, such as airplanes, rather than across the desert. Question: During what time were good moved through more modern means?
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[A]: yes

[Q]: Sentence: Insect respiration is accomplished without lungs. Question: Respiration for insects happens without what?
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[A]: yes

[Q]: Sentence: They consider use of the name Jehovah vital for proper worship. Question: Why don't Jehovah Witnesses celebrate the usual holidays and customs?
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[A]:
no