Task: Text Matching
Input (English): Sentence1: If dr orders a CT scan of abd/pelvic w/contrast an without, i can see it being done with contrast but what's the purpose of having it also without? 
 Sentence2: I recently got a CAT scan of the abdomen and pelvis with contrast done which came back normal but the symtpoms have been the same. What is the purpose of the scan?
Output (English): Dissimilar