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Carl Ludwig was a Private in the Union Army , received the Medal of Honor , on July 30 , 1896 , for his brave and gallant action at the Second Battle of Petersburg , Virginia during the American Civil War .
 person: Carl Ludwig; organization: Union Army; location: Virginia
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: Carl Ludwig, Union Army, Virginia 
Answer:
 person: Carl Ludwig; organization: Union Army; location: Virginia