Question: The 2009 Coca-Cola 600 was the which number stock car race, of the 2009 NASCAR Sprint Cup Series and the fiftieth iteration of the event, Stock car racing is a form of automobile racing found mainly and most prominently in the United States and Canada, with Australia, New Zealand and Brazil also having forms?
Sentence (from "1955 NASCAR Grand National Series"): However, the generation that would gain notoriety and fame through nepotism (i.e., their father or older brother having a ride before them) would emerge about ten years later.
Relevant evidence: No