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: I took Plan B on Feb. 11th, 2015 after having unprotected sex two days before. Now tonight I had protected sex, but the condom broke. I am wondering if the Plan B is still effective 5 days later? And if not, is it safe to consume another Plan B pill? 
 Sentence2: Hello doctor, I am of 18 years age and I had unprotected sex. Can I take Plan B? Do I need a prescription?

Answer: Dissimilar


Question: Sentence1: 21 f on birth control, period started late, period lighter than normal, pain in my belly that's not normal, been tired a lot more lately. what wrong? 
 Sentence2: Are delayed period, light periods, abdominal pain, tiredness common side effects of birth control?

Answer: Dissimilar


Question: Sentence1: I have external small hard darkish lump on my sternum, dead centre, 1 inch above nipple level. Not painful. Should I be concerned? 
 Sentence2: I tend to develop what I think are keloids and these are usually hard scar like tissue on the sternum. They dont seem to hurt but I have itching. What can I do about it?

Answer:
Dissimilar