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: However , by the time Schahzenan's army reaches the city , Scheherazade's plan has worked . 
Question: What happened after Scheherazade's plan had worked?
answer:
Yes.


question:
Sentence: For example, buy local produce at a farmers market, like the one in Figure 2.20. 
Question: What happened after produce was bought at the farmers market?
answer:
Yes.


question:
Sentence: In the end , they drive off , listening to the radio . 
Question: Was the vehicle they were driving built before the trip started?
answer:

No.


