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Current through a resistance causes localised heating , an effect James Prescott Joule studied mathematically in 1840 .
 person: James Prescott Joule
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: James Prescott Joule 
Answer:
 person: James Prescott Joule