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Rick then gives Charlie a nearly impossible task : find a shipping manifest on a birth control pill , Ovatril , so that Rick can change dates to avoid any legal liability to the company , but more importantly cover himself ; due to the fact he committed fraud .
 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