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: What muscles contribute to lower back pain? 
 Sentence2: I lifted heavy weights 2 days ago. I have been expeirencing severe lower back ache ever since. I believe I may have strained my lower back muscles but I am worried it may have caused disc bulge in my lower spine. What could be the chances?

Answer: Dissimilar


Question: Sentence1: Can you take tylenol (acetaminophen) and Advil together? Can you take tylenol (acetaminophen) and Advil together? 
 Sentence2: I am having severe pain, can I take Advil and Tylenol (acetaminophen) together?

Answer: Similar


Question: Sentence1: Been having this tenderness and pain in my breast for almost weeks....Not pregnant too. What coukd it be? 
 Sentence2: Is breast pain and tenderness a sign of breast cancer?

Answer:
Dissimilar