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: Eyebrows.  Are  thinning? 
 Sentence2: I noticed thinning of the eyebrows. What could it be from?

Answer: Similar


Question: Sentence1: My eyebrows and hair fallout a lot and my eyebrows don't grow back atall or grow really fast. I even used rogaine (minoxidil) to grow my eyebrows &didn't work. 
 Sentence2: What is the cause of eyebrows and hair fall?

Answer: Dissimilar


Question: Sentence1: When does a doctor use a large needle to stitch with? 
 Sentence2: Do large wounds require a large needle to stitch?

Answer:
Similar