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.

Input: Consider Input: Sentence: There was even a tiny room in the back of one of the closets.
Question: After buying the house, how long did it take the owners to notice the room?

Output: Yes.

Input: Consider Input: Sentence: Christianity was introduced into Gaul in the first century a.d.
Question: How long did it take to introduce Christianity to a typical person?

Output: Yes.

Input: Consider Input: Sentence: This is an astonishing new record for a coin, he said.
Question: What day was the record established?
Output: Yes.