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Initially the site of the Goodwin Gold Mine - gold was first discovered at the site in 1829 - the land later played host to Lake Anna , a reservoir created to serve as a coolant for Dominion Power 's nearby nuclear power plant .
 organization: Dominion Power
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: Dominion Power 
Answer:
 organization: Dominion Power