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.

Sentence1: My jaw makes a popping noise when I chew. Is this serious? 
 Sentence2: What can cause a popping sound in the jaw when one chews?
Similar

Sentence1: My son was in the ER last night for a reaction to his Adderall after they give him Xanax (alprazolam) about 1130 last night he is seen things? 
 Sentence2: I do see things. I have been prescribed Xanax ( Aprazolam) and as advised I took Adderall at 11:30, but I developed allergic reaction after that. Should I go to the ER? 
Dissimilar

Sentence1: When is it necessary to drink salt water? 
 Sentence2: Is it safe to drink salt water with a history of hypertension?

Dissimilar