TASK DEFINITION: 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.
PROBLEM: Sentence 1: Two dogs running down a beach. Sentence 2: two dogs running on the beach

SOLUTION: 5

PROBLEM: Sentence 1: A dog jumps in midair to catch a Frisbee. Sentence 2: The brown dog jumps for a pink Frisbee.

SOLUTION: 4

PROBLEM: Sentence 1: Analysts had been expecting a net loss of 54 cents a share, according to Thomson First Call. Sentence 2: Analysts had forecast second quarter sales of $614 million, according to the Thomson First Call Web site.

SOLUTION:
2