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: I wear a nightly mouthguard currently, but i was wondering if any damage from bruxism is reversible over time (does enamel heal)? 
 Sentence2: What does Bruxism do to the teeth in the long run?
answer:
Dissimilar


question:
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:  I have a history of constant headaches since 5 years. Seems like migraines recently. Consulting a local neurologist or an opthalmologist has not helped either.
answer:
Similar


question:
Sentence1: I shared food with people I don't know too well, eating from same plate. Have a canker sore. Chances of contracting oral/genital herpes? 
 Sentence2: What factors increase the causation of oral/genital herpes?
answer:

Dissimilar