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.
--------
Question: Sentence1: How can I prevent orthostatic hypotension? 
 Sentence2: What are the symptoms of orthostatic hypotension?

Answer: Dissimilar


Question: Sentence1: Eyebrows.  Are  thinning? 
 Sentence2: I noticed thinning of the eyebrows. What could it be from?

Answer: Similar


Question: Sentence1: I have three positive first response pregnancy tests with morning sickness two weeks ago but not since then, are the positive tests true positives? 
 Sentence2: Got a positive pregnancy test today. I have bad morning sickness. Can you help?

Answer:
Dissimilar