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Tetra Society of North America is a not-for-profit organization that provides volunteer engineers across Canada and the US to design and construct custom assistive devices for people with disabilities .
 organization: Tetra
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: Tetra