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: 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 are the symptoms of diphtheria 
 Sentence2: Could you apprise me of the symptoms of diptheria? 
answer:
Similar


question:
Sentence1: Why dose my chest hurt when stretching and coughing plus sneezing? 
 Sentence2: I've been coughing and sneezing a lot, does that mean I have pneumonia?
answer:

Dissimilar