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The 1956 Virginia 500 is a NASCAR Grand National ( now Sprint Cup Series ) race that took place on May 20 , 1956 at Martinsville Speedway in the American community of Martinsville , Virginia .
 organization: NASCAR; location: Martinsville; location: American; location: Martinsville; 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: NASCAR, Martinsville, American, Martinsville, Virginia 
Answer:
 organization: NASCAR; location: Martinsville; location: American; location: Martinsville; location: Virginia