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: Japan's opposition party chief criticizes Abe's economic policies Sentence 2: Zimbabwe‚Äôs opposition MDC party challenges Robert Mugabe‚Äôs election win

SOLUTION: 0

PROBLEM: Sentence 1: A man in a blue cap is sitting on a stool under a tree. Sentence 2: A dog standing on a beach with a ball nearby.

SOLUTION: 0

PROBLEM: Sentence 1: While opposition parties have welcomed the cabinet's decision on anti-retroviral treatment, some said Health Minister Manto Tshabalala-Msimang was not fit to preside over a rollout plan. Sentence 2: Health Minister Manto-Tshabalala Msimang is not fit to preside over an anti-retroviral treatment rollout plan, according to some opposition parties.

SOLUTION:
3