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.

Sentence 1: Martin said, "Why are you following me?" Sentence 2: Zimmerman replied, "What are you doing here?"
1

Sentence 1: myanmar was formerly known as burma. Sentence 2: myanmar was formerly called burma.
5

Sentence 1: An elderly man is speaking at a podium. Sentence 2: A man is making a speech at the podium.

4