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.
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Question: Sentence1: Why is my period blood dark brown, stopped after 4 hrs. Is this a period? 
 Sentence2: What does brown vaginal discharge mean?

Answer: Similar


Question: Sentence1: What does t means a positive ANA test and ifa? 
 Sentence2: Do I need to be fasting before taking ANA test?

Answer: Dissimilar


Question: Sentence1: I never had any pain before/during my period. The other day I started having pain in the pelvic area. At night it's so excruciating I can barely move. 
 Sentence2: I noticed severe pain in the pelvic area at night and could barely move. I'm currenrly on my period and have never experieced pain before/ during period. What could it be?

Answer:
Similar