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: The church ceremony starts with a formal procession.

SOLUTION: The church house starts with a formal morning .

PROBLEM: The effect of going into a coma is suspended life.

SOLUTION: The effect of laying into a coma is suspended life .

PROBLEM: Terrariums are useful for teaching children about mushrooms and animals .

SOLUTION:
Terrariums are useful for teaching teens about plants and animals .