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$ GM CEO Barra says Valukas report revealed no conspiracy by company to cover-up facts and no trade-off was made between safety and costs .
 location: GM; person: Barra; person: Valukas
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: GM, Barra, Valukas 
Answer:
 location: GM; person: Barra; person: Valukas