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.

Q: Sentence 1: A boy is playing with a toy. Sentence 2: A boy plays a handheld game.

A: 3
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Q: Sentence 1: Two green birds fly towards a wooden telephone pole. Sentence 2: Two green birds flying above the telephone wires.

A: 3
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Q: Sentence 1: Four boys are standing in front of the burning car. Sentence 2: Four young men stand still as a car explodes behind them.

A:
4
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