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: 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?
answer:
Similar


question:
Sentence1: Purple fluid filled sack on scalp grew over several months, popped when squeezed. Resembled skin tag. Concerned of cancer. Nothing for doc to check? 
 Sentence2: Can a cancerous lesion on the scalp present with symptoms such as a fluid filled sac occurring over many months with some discharge?
answer:
Similar


question:
Sentence1: I've had a cold for 1week. I just stopped antibiotics. Coughing up grey mucus sometimes. Dr isn't concerned. Should l take 2nd lot of antibiotics? 
 Sentence2: How is Strep throat diagnosed? Do I need to see a doctor for it?
answer:

Dissimilar