You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

Sentence: Jack played basketball after school, after which he was very tired. 
Question: How long did Jack play basketball?
Solution: Yes.
Why? All entities are in appropriate position and the question makes sense, so its grammatically and logically correct.

New input: Sentence: Some government officials were concerned that terrorists would take advantage of such breakdowns. 
Question: Is it normal for the officials to be concerned?
Solution:
No.