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?

Context paragraphs:
2014 Coca-Cola 600: The 2014 Coca-Cola 600, the 55th running of the event, was a NASCAR Sprint Cup Series stock car race held on May 25, 2014, at Charlotte Motor Speedway in Concord, North Carolina.  Contested over 400 laps on the 1.5 mi oval, it was the twelfth race of the 2014 NASCAR Sprint Cup Series.  Jimmie Johnson won the race, his first of the season and fourth overall Coca-Cola 600 win, while Kevin Harvick finished second and Matt Kenseth, Carl Edwards and Jamie McMurray rounded out the top five.  The top rookies of the race were Austin Dillon (16th), Kyle Larson (18th) and Cole Whitt (27th).

Stock car racing: 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 of stock car auto racing.  Traditionally, races are run on oval tracks measuring approximately 0.25 to .  The world's largest governing body for stock car racing is the American NASCAR, and its Monster Energy NASCAR Cup Series is the premier top level series of professional stock car racing.  Top level races typically range between 200 to in length.

2009 Coca-Cola 600: The 2009 Coca-Cola 600 was the twelfth stock car race of the 2009 NASCAR Sprint Cup Series and the fiftieth iteration of the event.  It was held on May 25, 2009, at Lowe's Motor Speedway in Concord, North Carolina after being postponed on May 24 because of inclement weather.  Scheduled for 400 laps on the 1.5 mi quad-oval, the race was won by David Reutimann after being shortened to 227 laps because of poor weather conditions.  Ryan Newman finished second ahead of Robby Gordon, Carl Edwards, and Brian Vickers, who completed the first five positions.

2013 Camping World RV Sales 301: The 2013 Camping World RV Sales 301 was a NASCAR Sprint Cup Series stock car race held on July 14, 2013, at New Hampshire Motor Speedway in Loudon, New Hampshire, United States.  Contested over 302 laps, it was the nineteenth race of the 2013 NASCAR Sprint Cup Series season.  Brian Vickers of Michael Waltrip Racing won the race, his third career Sprint Cup win, while Kyle Busch finished second.  Jeff Burton, Brad Keselowski, and Aric Almirola rounded out the top five.

2010 Price Chopper 400: The 2010 Price Chopper 400 was a NASCAR Sprint Cup Series stock car race that was held on October 3, 2010 at Kansas Speedway in Kansas City, Kansas.  The 300 lap race was the twenty-ninth in the 2010 NASCAR Sprint Cup Series.  The race was also the third event in the ten round Chase for the Sprint Cup competition, which would conclude the 2010 season.  Greg Biffle, of the Roush Fenway Racing team, won the race, with Jimmie Johnson finishing second and Kevin Harvick third.

1955 NASCAR Grand National Series: The 1955 NASCAR Grand National (now Monster Energy NASCAR Cup Series) Season began on November 7, 1954, and ended on October 30, 1955.  Even though the season was resolved in the course of two different years, all NASCAR personnel were allowed to have their traditional two-month silly season that traditionally comes between mid-November and mid-February.  Tim Flock won the 1955 championship by a margin of 1508 over top of Buck Baker.  This season was unusual because of its 11-month season (as opposed to the current 10-month season format).  As the ninth season of the series now known as the Monster Energy NASCAR Cup Series, most of the drivers involved were still the first-generation race car drivers.  They did not have any ties to the stock car racing world through their parents or grandparents although some of them served in World War II prior to their NASCAR careers.  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.  The average horsepower of a stock car competing the 1955 NASCAR Grand National season would be 230 horsepower (approximately 620 less horsepower than the vehicles used in the 2009 NASCAR Sprint Cup season).

2014 Ford EcoBoost 400: The 2014 Ford EcoBoost 400 was a NASCAR Sprint Cup Series stock car race held on November 16, 2014, at Homestead-Miami Speedway in Homestead, Florida.  Contested over 267 laps, it was the 36th and final race of the 2014 NASCAR Sprint Cup Series season, and the tenth and final race of the Chase for the Sprint Cup.  This race marked the final NASCAR broadcast for ESPN, ending an eight-year stint covering the sport; as well as the final NASCAR broadcast for Allen Bestwick, who has covered the sport since 1986.  Next season he will remain with ESPN and ABC calling IndyCar races.  Kevin Harvick held off Ryan Newman to score the victory and score his first ever championship.  Chevrolet clinched its twelfth consecutive manufacturers championship.  Newman was second while Brad Keselowski, Paul Menard, and Jamie McMurray rounded out the top five.  The top rookies of the race were Kyle Larson (13th), Justin Allgaier (15th), and Austin Dillon (25th).

2013 Coca-Cola 600: The 2013 Coca-Cola 600, the 54th running of the race, was a NASCAR Sprint Cup Series stock car race held on May 26, 2013, at Charlotte Motor Speedway in Concord, North Carolina, United States.  Contested over 400 laps on the 1.5–mile (2.4 km) oval, it was the twelfth race of the 2013 Sprint Cup Series championship.  Kevin Harvick of Richard Childress Racing won the race, his second win in the Coca-Cola 600 and in the 2013 season.  Kasey Kahne followed in the second while Kurt Busch, Denny Hamlin, and Joey Logano rounded out the top five.

2013 Ford EcoBoost 400: The 2013 Ford EcoBoost 400 was a NASCAR Sprint Cup Series stock car race that was held on November 17, 2013, at Homestead Miami Speedway in Homestead, Florida.  Contested over 267 laps, it was the thirty-sixth and final race in the 2013 NASCAR Sprint Cup Series, as well as the final race in the ten-race Chase for the Sprint Cup, which ends the season.  Denny Hamlin won the race.  Matt Kenseth finished second while Dale Earnhardt, Jr., Martin Truex Jr. and Clint Bowyer rounded out the top five.  Jimmie Johnson finished ninth to take his sixth Sprint Cup title.

2009 NASCAR Banking 500 only from Bank of America: The 2009 NASCAR Banking 500 only from Bank of America was a NASCAR Sprint Cup Series stock car race held on October 17, 2009 at Lowe's Motor Speedway in Concord, North Carolina.  The race was the thirty-first of the 2009 NASCAR Sprint Cup season, the fifth of the Chase for the Sprint Cup, and the only race scheduled at night during the ten-race Chase for the Sprint Cup that ended the season.

Supporting paragraphs: 2009 Coca-Cola 600 Stock car racing
Answer: twelfth