Instructions: 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.
Input: Sentence1: Does anyone know what can cause severe leg pain in both legs especially at night? 
 Sentence2: How to treat severe leg pain at night?
Output:
Dissimilar