A question that is free of any grammatical or logcal errors, should be labeled 'yes', otherwise it should be indicated as 'no'. A question is grammatically correct if all its entities i.e. nouns, verbs, adjectives, prepositions, pronouns, adverbs are at appropriate position. A question is logically correct if the semantic makes sense.

Ex Input:
Sentence: In particular, the author differentiates between what he terms 'dominance' and a particular version of 'colonization'.
Question: How often had the author differentiated between dominance and colonization before?

Ex Output:
Yes.

Ex Input:
Sentence: Like all energy, gravitational potential energy has the ability to do work.
Question: What time did the gravitational potential energy work?

Ex Output:
No.

Ex Input:
Sentence: He claimed it was more important for Muslims to kill Americans than to kill other infidels."".
Question: What happened after he began his claim?

Ex Output:
Yes.