[Q]: Sentence: The thermionic triode, a vacuum tube invented in 1907, enabled amplified radio technology and long-distance telephony. Question: When was the thermionic triode invented?
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[A]: yes

[Q]: Sentence: The British adopted "effective ceiling", meaning the altitude at which a gun could deliver a series of shells against a moving target; this could be constrained by maximum fuse running time as well as the gun's capability. Question: Who adopted the use of the term, effective ceiling?
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[A]: yes

[Q]: Sentence: The 2010 census showed that Seattle was one of the whitest big cities in the country, although its proportion of white residents has been gradually declining. Question: In 1960, what was the percentage of whites in the Seattle area?
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[A]:
no