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.

Q: Sentence 1: It also gives guidance to the manager who, in reviewing completed case studies, wants to assess their strengths. Sentence 2: The managers frequently are reviewing case studies.

A: no
****
Q: Sentence 1: They were justifiably concerned, advocates say. Sentence 2: The concern was quite normal due to the case.

A: no
****
Q: Sentence 1: The site is still compelling, though the fort itself is ruined. Sentence 2: The fort was ruined in the 19th century.

A:
no
****