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: Two people are walking through some water. Sentence 2: Two girls are walking by a tree in front of a brick building.

A: 1
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Q: Sentence 1: The cat played with a watermelon. Sentence 2: A cat is playing with a watermelon.

A: 5
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Q: Sentence 1: A man makes a call on a cell phone. Sentence 2: A man is making a phone call.

A:
4
****