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.

[Q]: Sentence1: My back hurts on my right side? 
 Sentence2: What causes back pain on the right side?
[A]: Similar


[Q]: Sentence1: Hi there are you able to help.me please Dr. Eric Kelts? I think I have a trapped nerve and its traveling from the bottom of my back down my legs, which I think may be siataca I'm not quite sure but I'm in agony. Cant move at all with my back! I struggled 
 Sentence2: What is sciatica and what are the symptoms?
[A]: Dissimilar


[Q]: Sentence1: I am convinced that at this moment Maxalt (rizatriptan) not working. My head feel so much worse. It hurts to move it, just to walk. Does Maxalt (rizatriptan) not work when PMS? 
 Sentence2: How is headache during PMS treated?
[A]:
Dissimilar