You will be given a definition of a task first, then some input of the task.
You are given a sentence and a question in the input. The information provided in the sentence should be enough to answer the question. You're expected to write the correct answer. Do not use any facts other than those provided in the sentence.

Sentence: They went back over the bridge and were happy to be back in a part of the woods they knew so well. 
Question: what did the bear and wolf cross, and why did they turn back?
Output:
Bridge, they loved woods they knew so well.