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: Man arrested over double murder Sentence 2: WA man arrested in police drug raid
Example Output: 1

Example Input: Sentence 1: Two birds interacting in the grass Sentence 2: Two dogs play with each other outdoors.
Example Output: 0

Example Input: Sentence 1: A baseball player throws the ball. Sentence 2: The basketball player holds the ball.
Example Output:
2