Task: Text Matching
Input (English): Sentence1: 2 years ago i had lyme ab screen mildly elevevated but western blot all non reactive. Now im testing pos for igm 23 and igm 41. What does this mean? 
 Sentence2: Can Lyme ab test positive after 2 years of exposure? I'm not sure if it can stay positive for this long.
Output (English): Similar