What is the beginning date of this inaugural season of a new FIA Champoinship for electrically powered cars, in which the Buenos Aires ePrix was first raced?
2014–15 Formula E season The 2014–15 FIA Formula E season was the inaugural season of a new FIA championship for electrically powered cars. It began on 13 September 2014 at Beijing in China and finished on 28 June 2015 in London after eleven races. Nelson Piquet Jr. came first in the overall standings, and so became the first ever Formula E champion.
2007 Atlantic Championship The 2007 Champ Car Atlantic Season was the thirty-third Champ Car Atlantic season, its sixth season as the prime feeder series for the Champ Car World Series. It began on April 8, 2007 and ended on August 12 after 12 races. The Cooper Tires Presents the Champ Car Atlantic Championship Powered by Mazda Drivers' Champion was Raphael Matos driving for Sierra Sierra Enterprises.