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: The state has been first to pass major public health initiatives that have spread throughout the country. 
Question: Is the health initiative been passed as of today?
Example Output: Yes.

Example Input: Sentence: Sarawak's coast and jungle interior were controlled by the Iban — Sea Dayak pirates and Land Dayak slash-and-burn farmers. 
Question: How long did it take for the Iban to take control of Sarawak's coast?
Example Output: Yes.

Example Input: Sentence: The Albanians first appear in the historical record in Byzantine sources of the late 11th century. 
Question: For how long did the Byzantines log historical records?
Example Output:
Yes.

