title: History of auto racing
context: One of the oldest existing purpose-built automobile racing circuits in the United States, still in use, is the 2.5-mile (4.02km)-long Indianapolis Motor Speedway in Speedway, Indiana, built from March to August 1909, when it first opened for racing.  It is the largest capacity sports venue of any variety worldwide, with a top capacity of some 257,000+ seated spectators.[16] The oldest asphalt-paved oval track in the United States is Thompson Speedway Motorsports Park in Thompson, Connecticut, once known as the "Indianapolis of the East."
question: What is the oldest car race?
answers: Indianapolis Motor Speedway