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: A gorilla is playing the drums. Sentence 2: A monkey is playing drums.

SOLUTION: 3

PROBLEM: Sentence 1: a cyclist is making his bike jump between two rocks. Sentence 2: A man jumps his bicycle in the air between two rocks.

SOLUTION: 4

PROBLEM: Sentence 1: Japan PM calls for quicker tsunami waste processing Sentence 2: Japan marks one year since quake and tsunami disaster

SOLUTION:
1