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Let the clever boy help find out the silver Audi RS6 C7 and dark grey BMW X5 in the Bottom Left
 color of vehicle: silver; brand of vehicle: Audi; vehicle model: RS6 C7; color of vehicle: dark grey; brand of vehicle: BMW; vehicle model: X5; position of vehicle: Bottom Left
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: vehicle type, position of vehicle, color of vehicle, orientation of vehicle, vehicle velocity, vehicle range, brand of vehicle, vehicle model, SUV, hatchback, sports car, sedan, bus, truck, vintage car, coupe, roadster, estate car, motorcycle, MPV, van 
Text: {0} 
 Entities: silver, Audi, RS6 C7, dark grey, BMW, X5, Bottom Left 
Answer:
 color of vehicle: silver; brand of vehicle: Audi; vehicle model: RS6 C7; color of vehicle: dark grey; brand of vehicle: BMW; vehicle model: X5; position of vehicle: Bottom Left