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 does it mean to have sporadic headaches? 
 Sentence2: I have tension headaches and have been under lot of stress. What do you recommend i do?

Answer: Dissimilar


Question: Sentence1: What might cause a slightly dilated common bile duct when all of the other organs look good? 
 Sentence2: What can be done if the common bile duct is dilated?

Answer: Dissimilar


Question: Sentence1: Can AST and ALT levvels rise due to a root canal prroceddure? 
 Sentence2: What causes the levels of AST and ALT to rise up?

Answer:
Dissimilar