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: David @OmSigDAVID, I think Santorum's more likely than Gingrich. Sentence 2: @sozobe, I think Santorum's more likely than Gingrich.

SOLUTION: 5

PROBLEM: Sentence 1: French parliament backs reform of law on prostitution Sentence 2: Russian parliament to consider ban on U.S. adoptions

SOLUTION: 1

PROBLEM: Sentence 1: A girl is wearing a purple sash and matching skirt. Sentence 2: A group of girls stands wearing jean skirts and superman shirts.

SOLUTION:
2