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His parents , wealthy planter Rice E. Graves , Sr. and his wife Amelia Rucker Gregory ( widowed daughter of American Revolutionary War Patriot CPT Jesee Richeson ) , had booked passage on the riverboat " Star of the West " .
 organization: Graves
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: Graves 
Answer:
 organization: Graves