[Q]: Sentence: The first lighting used on an airport was during the latter part of the 1920s; in the 1930s approach lighting came into use. Question: When did approach lighting come into use?
++++++++++
[A]: yes

[Q]: Sentence: Proving the existence of a positive growth rate and proving that the growth rate equals the interest rate were remarkable achievements, even for von Neumann. Question: In von Neumann's model what does q represent?
++++++++++
[A]: no

[Q]: Sentence: In this case Nasser's opponent could see his hand in the mirror and knew he was only holding a pair of deuces" and Nasser knew that his army is not prepared yet. " Question: Who was Nasser's vice president?
++++++++++
[A]:
no