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: I used a condom for sex. I checked for rips and it was fine, no rips. If it doesnt rip is it pretty much a sure bet effectiveness against stds? 
 Sentence2: I am just worried about getting STD's. I wanted to know if I am safe from STD's if I used a condom during sexual intercourse and it did not get torn or did not rip off. Pleae help.
[A]: Similar


[Q]: Sentence1: 36 M with clean cardiac echo stress and lipids. No risk factors. Pain in lower back and localized pain in upper left chest for 9 mths. Cardiac? Scared 
 Sentence2: I have been having some chest pain for a few hours now. Can my anxiety be causing it?
[A]: Dissimilar


[Q]: Sentence1: I had a root canal 3 months ago but tooth is still sensitive to hot. What could be the reason? 
 Sentence2: I have cavities in my tooth and my dentist advised to get root canal done. Can you tell me if the procedure is painful and how much time will it take?
[A]:
Dissimilar