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In some films , knitted string spray-painted with a metallic paint is used instead of actual mail in order to cut down on cost ( an example being " Monty Python and the Holy Grail " , which was filmed on a very small budget ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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