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 riding a skateboard. Sentence 2: A woman is cutting a potato.

SOLUTION: 0

PROBLEM: Sentence 1: Two large dogs running in some grass. Sentence 2: Two brindle dogs running in the grass.

SOLUTION: 4

PROBLEM: Sentence 1: Three Weeks in October goes on sale Monday, nearly a year after the Washington, D.C.-area sniper shootings started. Sentence 2: Moose's book goes on sale Monday, nearly a year after the sniper shootings started in the Washington area.

SOLUTION:
3