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.

Example Input: Sentence1: I've had problems with cosntant headaches for 5 years, now they are more like migraines, I've see neurologists, eye specialists and no one has helped me? 
 Sentence2: Can you please explain the symptoms of migraine headache?
Example Output: Dissimilar

Example Input: Sentence1: How do I tell the difference between an allergy and a sinus infection? 
 Sentence2: Can you tell me some OTC medications for allergies and sinus infection?
Example Output: Dissimilar

Example Input: Sentence1: I had 2 chest x rays done 2 different times with portable mechine I seen the image but did not see the ribs just lungs is that possible. 
 Sentence2: Can a rib fracture be diagnosed on a chest X-ray?
Example Output:
Dissimilar