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: Tell me, is there nothing familiar about the hand-writing of it?" Sentence 2: Does that handwriting not look like something you've seen before?
Example Output: yes

Example Input: Sentence 1: It is always wise to suspect everybody until you can prove logically, and to your own satisfaction, that they are innocent.  Sentence 2: You should assume that all are innocent until they are proven guilty.
Example Output:
yes