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.

[EX Q]: Sentence 1: After breakfast, I decided to go down to the village, and see if Poirot had returned yet; but, before I could start, a wellknown face blocked one of the windows, and the well-known voice said: "Bon jour, mon ami!" Sentence 2: The person had intentionally interrupted me not only to delay but to stop me from looking for Poirot. 
[EX A]: no

[EX Q]: Sentence 1: Accuracy and usefulness of the breath alcohol analyzer. Sentence 2: The breath alcohol analyzer's accuracy needs to be improved in order for its usefulness to improve.
[EX A]: no

[EX Q]: Sentence 1: Otherwise, there are some beaches or sections of beaches where swimming is less recommended or even dangerous for all except experts. Sentence 2: All sections of the beaches are safe for swimming for people of all abilities.
[EX A]:
yes