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.

Ex Input:
Sentence 1: Cristiano Ronaldo hat-trick fires Portugal to 2014 World Cup finals Sentence 2: Ronaldo hat-trick fires Portugal to World Cup

Ex Output:
5


Ex Input:
Sentence 1: And I'm your friend Mitt. Sentence 2: Your good friend Mitt.

Ex Output:
4


Ex Input:
Sentence 1: 7 dead in Christian school shooting Sentence 2: 5 wounded in Ohio school shooting

Ex Output:

1