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.

[EX Q]: 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?
[EX A]: Similar

[EX Q]: Sentence1: Are Sympathetic Nerve Blocks effective at calming the sympathetic system which causes angina and migraines? If not, why not? Would seem logical.
Sentence2: Does an active sympathetic system cause angina and migraines? Wouldn't nerve blocks help in such cases?
[EX A]: Similar

[EX Q]: Sentence1: I'm on my period, and i had unprotected sex, and he came inside me. 2 days later, the bleeding from my period stopped. Is that a chance of pregnancy?
Sentence2: I had intercourse on the second day of my pregnancy and it as unprotected. After intercourse my bleeding stopped 3 days back. Is there any chance of pregnancy?
[EX A]:
Similar