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: In school, Atta came across as very intelligent and reasonably pleasant, with an excellent command of the German language.
Question: How long was Atta in the school?

Output: Yes.

Input: Consider Input: Sentence: So really, that's what many of the people are doing now,"" he said.
Question: How long will they be doing that?

Output: Yes.

Input: Consider Input: Sentence: For example, what if you place a cake in the oven and you leave it in too long?.
Question: What time would you put the cake in the oven?
Output: Yes.