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.

Example Input: Sentence: A. DeConcini Federal Courthouse, 405 W. Congress St. Deconcini was one of the organization's early board members. 
Question: What happened after the board was formed?
Example Output: Yes.

Example Input: Sentence: The Portuguese Crown, delighted with its first important discovery, immediately embarked on a program of colonization. 
Question: How often did the Portuguese send new settlers to the colonies?
Example Output: Yes.

Example Input: Sentence: Dam Square was landlocked for the first time in its history. 
Question: Was it always located there?
Example Output:
No.

