Definition: You are given a sentence and a question in the input. If the information provided in the sentence is enough to answer the question, label "Yes", otherwise label "No". Do not use any facts other than those provided in the sentence while labeling "Yes" or "No". There are only two types of valid responses: Yes and No.
Input: Sentence: The beaver thanked both the bear and the wolf for trying out his new bridge and then started to build yet another bridge close to the first bridge. 
Question: what did the bear and wolf cross, and why did they turn back?

Yes.