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: Space travel lets us attract other philosophers .

SOLUTION: Z email lets us thank other experts .

PROBLEM: You are likely to find an altar in a church.

SOLUTION: You are close to find an altar in a mirror .

PROBLEM: You are likely to find a steel pen in a writer's pocket.

SOLUTION:
You are likely to find a steel pen in a bartender 's pocket .