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: The broader Standard & Poor's 500 Index <.SPX> was up 9.69 points, or 0.98 percent, at 994.53. Sentence 2: The tech-laced Nasdaq Composite Index <.IXIC> gained 18.35 points, or 1.13 percent, to 1,646.02.

Ex Output:
1


Ex Input:
Sentence 1: A group of people are firing up a hot air balloon. Sentence 2: A large group of people riding brown and white horses.

Ex Output:
0


Ex Input:
Sentence 1: The cat is sitting between two bicycles in front of a door. Sentence 2: Than horse standing in a field in front of a fence.

Ex Output:

0