instruction:
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.
question:
Sentence: Our investigation has uncovered no credible evidence that any person in the United States gave the hijackers substantial financial assistance. 
Question: How often are investigations like this launched?
answer:
Yes.


question:
Sentence: Mzoudi studied in Dortmund, Bochum, and Muenster before moving to Hamburg in 1995. 
Question: Did Mzoudi still study after moving to Hamburg ?
answer:
Yes.


question:
Sentence: She began to tell the story of Majestic, the wild horse who could not be calmed. 
Question: How long did she tell the story?
answer:

Yes.


