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: She's still working on it, a Pentagon source tells me. Sentence 2: She's working on it, but not very hard.
Example Output: no

Example Input: Sentence 1: And you think that will tell you anything? He gave a short disagreeable laugh. Sentence 2: You know they will spill all the details in you lap?
Example Output: yes

Example Input: Sentence 1: What it can do is suggest some general principles. Sentence 2: It is unable to suggest any general principles.
Example Output:
yes