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For example , we tend to view food that has touched the ground as contaminated by the ground , and therefore unfit to eat , or we view a person who has touched a diseased person as likely to carry the disease ( regardless of the actual contagiousness of the disease ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None