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.

Example Input: Sentence 1: A woman is boiling shrimp. Sentence 2: A woman is combing her hair.
Example Output: 1

Example Input: Sentence 1: A woman wearing a pink shirt jumps in the air with her arms and legs spread to her sides. Sentence 2: A man wearing suspenders and sunglasses leaps up in the air with his arms and legs spread out to the side.
Example Output: 2

Example Input: Sentence 1: Putin casts ballot as Russians vote Sentence 2: Putin to win Russia's presidential election
Example Output:
1