Given the task definition and input, reply with output. In this task, you are given two sentences in Persian separated with <sep>, and you have to determine whether the sentences are paraphrases or not. Classify your answers into "paraphrase" and "not-paraphrase".

الگوریتم expectation-maximization چیست؟ <sep> توضیح شهودی الگوریتم expectation-maximization چیست؟

paraphrase