Q: 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: The landscape of the valley changed dramatically over the next 200 centuries. Sentence 2: After 200 centuries, the valley's landscape was changed.
A:
yes