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.

Example 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.
Example Output: yes

Example Input: Sentence 1: and um i went to court and you can even get a trial by jury for a traffic ticket Sentence 2: You cannot get a trial for anything at all.  
Example Output: yes

Example Input: Sentence 1: Sulfur dioxide emissions were far below allowable levels during Phase I. Sentence 2: The emissions were lower than the allowable levels.
Example Output:
yes