Given the task definition and input, reply with output. You are given two sentences(Sentence1 and Sentence2). Answer "Yes" if these sentences are a paraphrase of one another, otherwise answer "No".

Sentence1: Sobig.F became one of the most widespread viruses ever , crippling corporate e-mail networks and filling home users ' inboxes with a glut of messages ., Sentence2: Since surfacing late Monday , Sobig.F has been crippling corporate e-mail networks and filling home users ' inboxes with a glut of messages .
Yes