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: A man is speaking on a stage. Sentence 2: A man is speaking at a podium.

A: 3
****
Q: Sentence 1: A group of sheep grazing on a hill. Sentence 2: A group of sheep are on a hill.

A: 4
****
Q: Sentence 1: Two shirtless young people playing in the water. Sentence 2: Lots of people play in the water at the beach.

A:
2
****