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: Consider Input: Sentence 1: Becker, Howard S. Problems of Inference and Proof in Participant Observation. Sentence 2: Problems of Inference and Proof in Participant Observation is related to Howard Becker.

Output: yes


Input: Consider Input: Sentence 1: is that a U S territory though Sentence 2: That's a U.S. territory, right?

Output: yes


Input: Consider Input: Sentence 1: a launch to say let's conserve more because he never said that Sentence 2: He never said let's conserve more


Output: yes