instruction:
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: If I have an astigmatism , could that be causing daily headaches? I do not wear glasses but i work on a p.C. All day and a lot of bright lighting. 
 Sentence2: What is the treatment for headaches caused by astigmatism?
answer:
Dissimilar


question:
Sentence1: How to tell if nuvaring side effects or early signs of pregnancy? 
 Sentence2: How can I differentiate between side effects of nuvering and early pregnancy symptoms?
answer:
Similar


question:
Sentence1: After many courses of antibiotics i still have the helicobacrer bacteria. What can you advise me? 
 Sentence2: Hello doctor, I have been h.pylori bacteria. Am I at risk of getting cancer?
answer:

Dissimilar