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: At least Mexico had a presence in California. Sentence 2: Mexico has ZERO claim to California.

SOLUTION: 1

PROBLEM: Sentence 1: A man wearing a orange vest is canoeing in the blue water. Sentence 2: A man in an orange jacket raising his hands to the sky in the sand.

SOLUTION: 2

PROBLEM: Sentence 1: Dolores Mahoy, 68, of Colorado Springs, Colo., is someone who might be helped by the legislation pending in Congress. Sentence 2: Dolores E. Mahoy, 68, of Colorado Springs is just the type of person who might be helped by the legislation pending in Congress.

SOLUTION:
5