Evaluate the similarity between them and classify them into classes from 0-5 as follows:
0 : The two sentences are completely dissimilar.
1 : The two sentences are not equivalent, but are on the same topic.
2 : The two sentences are not equivalent, but share some details.
3 : The two sentences are roughly equivalent, but some important information differs/missing.
4 : The two sentences are mostly equivalent, but some unimportant details differ.
5 : The two sentences are completely equivalent, as they mean the same thing.
Q: Sentence 1: Lawyers and others familiar with the federal investigation say it remains focused on Campbell, though prosecutors declined to discuss the probe. Sentence 2: While federal prosecutors refuse to discuss the investigation, lawyers and others familiar with it say it remains focused on Campbell.
A:
5