Does the sentence "Three-phase AC railway electrification was used in Italy, Switzerland and the United States in the early twentieth century." provide a valid answer to the question "How long did three-phase system operate in Cascade Tunnel?" OPTIONS:
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A: no

Question:
Choose your answer: Is "This practice goes back to the Apollo-Soyuz mission, which first flew in 1975." a good answer to the question "When did Apollo-Soyuz fly?" OPTIONS:
- yes
- no
Answer:
yes

QUES: Q: What was Tito's form of communism called?
A: The event was significant not only for Yugoslavia and Tito, but also for the global development of socialism, since it was the first major split between Communist states, casting doubt on Comintern's claims for socialism to be a unified force that would eventually control the whole world, as Tito became the first (and the only successful) socialist leader to defy Stalin's leadership in the COMINFORM.
Does the answer answer the question? OPTIONS:
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ANS: no

Does "Encompassing $363 billion, the Greater Boston metropolitan area has the sixth-largest economy in the country and 12th-largest in the world." contain the correct answer to "What ranking in the country does Greater Boston metro hold as far as economy?"
OPTIONS:
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A: yes

question: OPTIONS:
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In all, 67.8% of Estonia's population can speak Russian.
How much of Estonia is ethnic Russians?

answer: no

question: OPTIONS:
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Its north and northeast border is with the Tibet Autonomous Region and Yunnan province for a Sino-Burman border total of 2,185 km (1,358 mi).
What region lays along the north border of Burma and is famed for the presence of monks ?

answer:
yes