Instructions: In this task, you're given a pair of sentences, sentence 1 and sentence 2. Your job is to determine if the two sentences clearly agree/disagree with each other, or if this can't be determined. Indicate your answer as yes or no respectively.
Input: Sentence 1: To begin with, said Tuppence, "what have we to go upon?" Sentence 2: What are we up against, said Tuppence.
Output:
yes