In this task, you are given a word. You should respond with a valid sentence which contains the given word. Make sure that the sentence is grammatically correct. You may use the word in a different tense than is given. For example, you may use the word 'ended' in the output where the given input word is 'end'.
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Question: rock

Answer: That mountain is solid rock.


Question: stage

Answer: At what stage are the social sciences?


Question: rotate

Answer:
We rotate the lead soprano every night.