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: they didn't say what they just said they thought acid rain's contribution may be less than was previously suspected um but it may be other natural things at work um Sentence 2: They were disappointed to see the acid rain was getting worse by the hour.
Output:
yes