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.

[EX Q]: Sentence1: Hello i noticed I have a small black dot  on my gum the mark takes up the surface area of the very tip of my gum tissue.The part looks like a triangle? 
 Sentence2: What could cause a small, blackish dot at the tip of my gums?
[EX A]: Similar

[EX Q]: Sentence1: Is it contraindicated to insert a urinary catheter into a patient who has a myocardial infarction? 
 Sentence2: I am looking for some information- Is it safe to insert a urinary catheter in a patient with myocardial infarction or are there any risks involved?
[EX A]: Similar

[EX Q]: Sentence1: How much time do you have to have sex for to get pregnant? 
 Sentence2: I have been trying to coceive for 2 yrs now. How long should I try before considering fertility treatment?
[EX A]:
Dissimilar