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: What is ovulation and when will female ovulates? 
 Sentence2: I have recently become sexually active and have heard that I should avoid having unprotected sex during ovulation as it can lead to pregnancy. Is that true? How can I know when I would ovulate?
answer:
Similar


question:
Sentence1: How do you safely remove a swimmer with a possible head injury from the water? 
 Sentence2: What are the chances of having a head injury in a swimmer?
answer:
Dissimilar


question:
Sentence1: What to do if I have some symptoms thought that i don't know if they could be PMS or pregnancy ? 
 Sentence2: I am getting PMS symptoms. When can I  expect my period to start?
answer:

Dissimilar