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 dog emerges form the water with a stick in its mouth. Sentence 2: A dog runs toward the camera with a stick in its mouth.

SOLUTION: 2

PROBLEM: Sentence 1: A group of youngsters swim in lake water Sentence 2: Many children are playing and swimming in the water.

SOLUTION: 4

PROBLEM: Sentence 1: What makes you think the owl didn't participate? Sentence 2: It doesn't say that it didn't participate.

SOLUTION:
2