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: Fossils tell an obscure story of man's slow and sporadic development. 
Question: How often is a new fossil found that is considered really significant to our thinking?

Output: Yes.


Input: Consider Input: Sentence: Finley only realizes with hindsight that his misdeeds far surpass those of Violet . 
Question: What time does Finley most likely go to bed?

Output: No.


Input: Consider Input: Sentence: In actual practice, however, we act too often as if we only cared for economic values. 
Question: How often do we only care for economic values?


Output: Yes.


