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: georgian government websites are under intense cyber attack following russian military strikes against georgia late last week. Sentence 2: the cyber attacks follow russian military strikes launched against georgia late last week.

SOLUTION: 5

PROBLEM: Sentence 1: A man stands astride a bike on a rocky trail by a lake. Sentence 2: A woman is wearing a white headband, purple tank top and black gloves.

SOLUTION: 0

PROBLEM: Sentence 1: Ex-first lady Barbara Bush leaves Texas hospital Sentence 2: Former first lady Barbara Bush leaves hospital

SOLUTION:
5