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: They first traveled by plane around Europe, where they saw many different people and sights. 
Question: What happened after the planes would land.?

Answer: No.


Question: Sentence: With this, it became impossible for me to stay upstairs, he said, pointing to the scars on his forearm. 
Question: When did he get his scars?

Answer: No.


Question: Sentence: At the same time, the Sudanese regime began to change. 
Question: When did the regime begin to change?

Answer:
Yes.


