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.

Example Input: Sentence 1: After protesters rushed the stage and twice cut power to the microphone, Hedges drew the speech to an early close. Sentence 2: After protesters rushed the stage and twice cut power to the microphone, Hedges cut his speech short.
Example Output: 5

Example Input: Sentence 1: Tokyo to host 2020 Olympic Games Sentence 2: Wrestling to feature in 2020 Tokyo Olympics
Example Output: 1

Example Input: Sentence 1: Spot gold was quoted at $367.90/368.60 an ounce at 1000 GMT, having marched up to $369.50 -- a level not seen since February 10. Sentence 2: Spot gold was quoted at $358.65/359.15 an ounce at 0500 GMT, having darted as high as $359.25 -- a level not seen since February 25.
Example Output:
3