Task: Text Matching
Input (English): 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 .
Output (English): Yes