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: Indian finance minister quits to run for president Sentence 2: Julian Assange Plans to Run for Australian Senate
Example Output: 0

Example Input: Sentence 1: Two dogs swim in a pool. Sentence 2: Dogs are swimming in a pool.
Example Output: 4

Example Input: Sentence 1: zabol is a town in southeastern iran. Sentence 2: khoramabad is a city in western iran.
Example Output:
1