instruction:
In this task you are given a medical question pair hand-generated. Your task is to classify a given post into two categories 1) 'Similar' if the given two questions have a same connotation 2) 'Dissimilar' if the given two questions have a different connotation or meaning.
question:
Sentence1: How long after conception does implantation bleeding start? Last period 11/13-18 unprotected sex nov 25 
 Sentence2: Hello doctor, I am on birth control pills and I am sexually active. I am spotting now after 3 weeks and is it withdrawal bleeding or implantation bleeding? 
answer:
Dissimilar


question:
Sentence1: What are some illnesses of the lymphatic system? 
 Sentence2: I think I have symptoms of illness of lymphatic system. How can I treat it? 
answer:
Dissimilar


question:
Sentence1: I have big boobs and my nipples are not out. My nipples comes out when i'm cold or when i touch them. Is that normal for my nipples to pop out? 
 Sentence2: Would the type of bra I wear be causing my nipples to get more prominent?
answer:

Dissimilar