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: it will be hosted by the australian government. Sentence 2: the u.s. plans have angered the russian government.

SOLUTION: 0

PROBLEM: Sentence 1: chinese authorities were not immediately available for comment. Sentence 2: godzhayev and godzhayev's lawyers were not immediately available to comment.

SOLUTION: 1

PROBLEM: Sentence 1: The boy is playing the piano. Sentence 2: A boy plays a piano.

SOLUTION:
5