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 people are walking through some water. Sentence 2: Two girls are walking by a tree in front of a brick building.

SOLUTION: 1

PROBLEM: Sentence 1: A plane being readied for take-off. Sentence 2: A small turboprop plane being loaded on the tarmac.

SOLUTION: 3

PROBLEM: Sentence 1: a spokesman for stockwell day was not immediately available for Sentence 2: chinese authorities were not immediately available for comment.

SOLUTION:
1