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: The choir and chancel do not stand on the island's granite core but on a platform formed by three crypts, with the massive columns of the Crypte des Groseiliers doing most of the work. Sentence 2: Nothing ever stands on the island's granite core.
Example Output: no

Example Input: Sentence 1: The crowds thinned and the tent city rose around them, mostly empty at this time in the morning. Sentence 2: It was really busy that morning.
Example Output: yes

Example Input: Sentence 1: Penn and the New Democrats disagree with all this. Sentence 2: Penn and the New Democrats have valid concerns with this.
Example Output:
no