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: 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: How to know if you miscarried without passing fetus? 
 Sentence2: I am 6 weeks pregnant. I have been reading articles about pregnancy care and I came across one that says chances of miscarriage are high during the first 12 weeks of pregnancy. I am worried now, is this true? 

SOLUTION: Dissimilar

PROBLEM: Sentence1: I am on penicillin for about a month now, a week ago I started seeing my period but by the afternoon it stopped. Can penicillin delay periods? 
 Sentence2: Can Penicillin interfere with my birth control pill?

SOLUTION:
Dissimilar