Question: How many triple-header rounds occurred after the first non-championship round on the 4.304 km motorsport race track named after the Rodriguez racing drivers, before its finish in 2016?
Sentence (from "Autódromo Hermanos Rodríguez"): The circuit got its name shortly after it opened when Ricardo Rodríguez died in practice for the non-Championship 1962 Mexican Grand Prix.
Relevant evidence: No