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: What causes a 17 year old girl to experience pain and also a feeling of bubbles popping above the navel area? 
 Sentence2: I am a 17 years old healthy girl but for the past 2-3 days, I have been having dull pain around belly button and there is some weird feeling as if some bubbles are popping above my navel area. I wonder what could be the cause of this? 
answer:
Similar


question:
Sentence1: Late menstrual period after bad carwreck? 
 Sentence2: I am late for my period. Can I be pregnant?
answer:
Dissimilar


question:
Sentence1: Can a man with impotence or erectile dysfunction ejaculate during sleep and have nocturnal emissions? 
 Sentence2: I am 27 years old and have recently been prescribed medication for Erectile dysfunction. I notice that I keep having nocturnal emissions. Is that expected with the medication?
answer:

Dissimilar