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Fishing down the food web is the process whereby fisheries in a given ecosystem , " having depleted the large predatory fish on top of the food web , turn to increasingly smaller species , finally ending up with previously spurned small fish and invertebrates . "
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
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