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.

Q: Sentence1: Does lung cancer always effect oxygen levels. 
 Sentence2: I was diagnosed with lung cancer and I have been on therapy. My oxygen saturation levels have been around 90% and I am worried if this is ever going to improve. Should I ask my doctor if therapy needs to be changed?

A: Dissimilar
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Q: Sentence1: What are some illnesses of the lymphatic system? 
 Sentence2: I think I have symptoms of illness of lymphatic system. How can I treat it? 

A: Dissimilar
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Q: Sentence1: What do you suggest if my son was just diagnosed with a heart murmur. he just turned 3 and I thought murmurs were diagnosed at birth? 
 Sentence2: What conditions present with a heart murmur?

A:
Dissimilar
****