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After appearing in a VlogBrothers video by Hank Green in 2012 , she joined the group of educational YouTube channels herself in 2013 with " The Brain Scoop " .
 Hank Green
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hank Green