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.
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Question: 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?

Answer: Yes.


Question: Sentence: Among the travelers were Mohamed Atta and Abdul Aziz al Omari, who arrived at the airport in Portland, Maine. 
Question: What did the travelers do after arriving at the airport?

Answer: Yes.


Question: Sentence: With large population movements in the 1990s to urban areas, the provision of education has undergone transformation as well. 
Question: How long of a time do we refer to when we say ""the 1990s""?

Answer:
No.


