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: A man is tying his shoe. Sentence 2: A man ties his shoe.

SOLUTION: 5

PROBLEM: Sentence 1: Umm the California was a cargo ship I dont care what the article says. Sentence 2: The California was a cargo ship.

SOLUTION: 4

PROBLEM: Sentence 1: Its shares fell 71 cents, or 3.5 percent, in after-hours trading to $19.55. Sentence 2: The stock had risen 63 cents, or 3 percent, to close at $20.26 in regular-session Nasdaq trading.

SOLUTION:
1