TASK DEFINITION: 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.
PROBLEM: You are likely to find a pin in a tree .

SOLUTION: You are likely to find a grape in a tree.

PROBLEM: You can include a point of beer to have a recipe .

SOLUTION: You can use a straw of beer to have a fireball .

PROBLEM: You would do some exercises because you continue using your body .

SOLUTION:
You would do some exercises because you enjoy using your body.