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Raspberry Plain In 1760 , Mason purchased Raspberry Plain plantation in Loudoun County , Virginia In 1771 , Thomson built the mansion at Raspberry Plain .
 person: Mason; location: Loudoun County; location: Virginia; person: Thomson
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Mason; location: Loudoun County; location: Virginia; person: Thomson