Complex sentence: It was first established by Steve Earle in 1974 as the Monterey Historic Automobile Races, who organized the meeting for his friends to race their cars at Laguna Seca.
Split into simpler sentences: It was first established by Steve Earle in 1974 as the Monterey Historic Automobile Races. Earle organized the meeting for his friends to race their cars at Laguna Seca.