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.

Q: Sentence1: I have headache please suggest? 
 Sentence2: What are the different kinds of headache?

A: Dissimilar
****
Q: Sentence1: How do I tell the difference between an allergy and a sinus infection? 
 Sentence2: What are the symptoms that differentiate between allergy and a sinus infection?

A: Similar
****
Q: Sentence1: Is the candida retested after treatment? 
 Sentence2: Is the Chlamydia retested after treatment?

A:
Dissimilar
****