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.

A snowball is used to defend oneself against an alert .
A chain is used to store oneself against an attack .

The effect of attending a rock beach is going deaf .
The effect of attending a rock concert is going deaf.

The mystery of grasping a mountain is to twist the other side .

The upside of getting a mountain is to bike the other side .