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: The oldest rocks are 500 million-year-old slates found around the northern peak of Skiddaw, where the mountains have smooth and rounded profiles. Sentence 2: The rocks are only 2 million years old.
Output:
yes