[Q]: Sentence: These dikes were destroyed during the siege of Tenochtitlan, and during colonial times the Spanish regularly drained the lake to prevent floods. Question: What happened to the dikes the Aztecs built?
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[A]: yes

[Q]: Sentence: Public education in Tajikistan consists of 11 years of primary and secondary education but the government has plans to implement a 12-year system in 2016. Question: What is the name of one of the tertiary education institutions?
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[A]: no

[Q]: Sentence: Icelandic and Faroese have preaspirated [p t k]; some scholars interpret these as consonant clusters as well. Question: What do preaspirated stops contrast with in Icelandic?
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[A]:
no