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: Questions about durables holdings--cars, housing, and personal computers. Sentence 2: They had not prepared any questions.
Example Output: yes

Example Input: Sentence 1: Drew commented on that, and Nye answered: "Old Man knows what's he's doin'. Sentence 2: Nye responded, "Old Man is totally in the dark here. 
Example Output: yes

Example Input: Sentence 1: His serious business included organizing the first system of man-made levees to protect the city from the Mississippi. Sentence 2: The system of man-made levees took several years to build.
Example Output:
no