Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Ex Input:
Fact: migration is an instinctive behavior

Ex Output:
Geese fly south for the winter because?


Ex Input:
Fact: riding a bike does not cause pollution

Ex Output:
Riding a two wheeled human powered vehicle is good for the environment because?


Ex Input:
Fact: a leaf absorbs sunlight to perform photosynthesis

Ex Output:

A plant performs less photosynthesis in?