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: Still , Preetam vows to marry Nandini if she meets him again . 
Question: How long had they known each other?

Ex Output:
Yes.


Ex Input:
Sentence: Radio Televizioni Shqiptar (RTSH) is the public radio and TV broadcaster of Albania, founded by King Zog in 1938. 
Question: Is King Zog still living?

Ex Output:
Yes.


Ex Input:
Sentence: Britain finally ceded the island to Spain in the year 1802, under the terms of the Treaty of Amiens. 
Question: Is the island still owned by Spain?

Ex Output:

Yes.


