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The radio teleswitch project was chaired by Walter Waring , deputy chairman of Eastern Electricity , and supported by the BBC .
 organization: Eastern Electricity; organization: BBC
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: Eastern Electricity, BBC 
Answer:
 organization: Eastern Electricity; organization: BBC