TASK DEFINITION: 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.
PROBLEM: 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? 

SOLUTION: Dissimilar

PROBLEM: Sentence1: Why does my back hurt when I breathe or bend over? Its kind of in my upper middle back but just on the right side. 
 Sentence2: I started noticing pain in the upper middle back on the right side and hurts to breathe and bend over. Any idea what it could be?

SOLUTION: Similar

PROBLEM: Sentence1: Haven't got my period since July cause I'm irregular could I still get pregnant? 
 Sentence2: I get irregular period but I want pregnancy. Any tips?

SOLUTION:
Dissimilar