What is the fine-grained topic of the following text: On Sunday, March 13th, drivers such as Graham Rahal, Josef Newgarden, Marco Andretti, Ryan Hunter-Reay, Charlie Kimball, Ed Carpenter, Simon Pagenaud, Tony Kanaan, Carlos Munoz and all of the IndyCar stars will battle it out for the checkered flag. Only return the topic.
IndyCar race on March 13th