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Before " King Kong " entered production , a long tradition of jungle films existed , and , whether drama or documentary , such films ( for example " Stark Mad " ) generally adhered to a narrative pattern that followed an explorer or scientist into the jungle to test a theory only to discover some monstrous aberration in the undergrowth .
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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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