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: This is a simplification of reality, which probably involves a curve with a slight upward slope. Sentence 2: In reality, it's probably a 20 degree upward slope. 
Example Output: no

Example Input: Sentence 1: Others believed that only total (historical) costs should be used. Sentence 2: And the others believed that only thistorical (total) costs should be used.
Example Output: yes

Example Input: Sentence 1: For example, the reference [SFFAS 7, para. Sentence 2: SFFAS 7 provides no supporting information.
Example Output:
yes