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 paddling a canoe. Sentence 2: A man is playing a harp.

SOLUTION: 1

PROBLEM: 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.

SOLUTION: 0

PROBLEM: Sentence 1: Capello quits as England manager Sentence 2: Capello resigns as England manager

SOLUTION:
5