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 "2015–16 NACAM Formula 4 Championship"): It began on 1 November 2015 with a non-championship round at the Autódromo Hermanos Rodríguez in Mexico City, and finished on 25 June 2016 at the same venue after seven triple-header rounds.
Relevant evidence: Yes