You will be given a definition of a task first, then some input of the task.
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.

Sentence 1: We all knew the rules, so no one needed an OPEN sign. Sentence 2: The rules are simple--knock on the window twice, and you can get in, and don't litter.
Output:
no