instruction:
Given a sentence, generate a new sentence by performing small changes on the sentence. Here, make sure that the changes are semantically related and syntactically similar to the input. And the generated sentence should have high commonsense plausibility, that is to have reasonable probability of it being true.
question:
You can use an underground area to protect from sky attack.
answer:
You can use an underground area to protect from sky ash .


question:
A heart is for pumping blood through the chamber .
answer:
A A is for ensuring blood through the water .


question:
The effect of climbing a mountain is to reach the top.
answer:

The story of climbing a mountain is to reach the brink .