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This was demonstrated by the fact that he had exclusive use of the quick but unreliable Renault turbo-charged 93 T for the whole season , and Mansell did not get to drive a turbocharged car until the ninth round , the British Grand Prix at Silverstone , a race where he climbed from 16th to second and eventually finished fourth in a brand-new , hastily designed 94 T. Due to their tumultuous relationship and a lack of decent results , Warr was not keen on honouring the last year of the contract that Mansell had signed with Chapman .
 Renault, Mansell, Silverstone, Warr, Mansell, Chapman
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Renault, Mansell, Silverstone, Warr, Mansell, Chapman