instruction:
The answer will be 'yes' if the provided sentence contains an explicit mention that answers the given question. Otherwise, the answer should be 'no'. Instances where the answer is implied from the sentence using "instinct" or "common sense" (as opposed to being written explicitly in the sentence) should be labeled as 'no'.
question:
Sentence: At current rates of use, coal will last about 300 years.
Question: How often are the coal reserves calculated?
answer:
No.

question:
Sentence: However , by the time Schahzenan's army reaches the city , Scheherazade's plan has worked .
Question: Will Schahzenan's army still reside in the city?
answer:
No.

question:
Sentence: Ana studied very hard to be the best she could be at spelling.
Question: Did Ana continue to study hard the next year?
answer:
No.