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 birds interacting in the grass Sentence 2: Two dogs play with each other outdoors.

SOLUTION: 0

PROBLEM: Sentence 1: He told the jury Stubbs is a "cold, calculating killer." Sentence 2: District Attorney Dave Lupas reminded jurors that Stubbs is, "a cold, calculating killer".

SOLUTION: 3

PROBLEM: Sentence 1: While some other parts of Africa have been used as staging grounds for the terror group, Malawi previously had not been a major focus of investigations into al-Qaida. Sentence 2: While some other parts of Africa have been used as Al Qaeda staging grounds, Malawi had previously not been a major focus of investigations into the group.

SOLUTION:
5