Question: The final stretch of the 2015 Chilean telethon was held at a stadium that has an official capacity of how much?
Sentence (from "Estadio Nacional Julio Martínez Prádanos"): Estadio Nacional Julio Martínez Prádanos (originally known as Estadio Nacional) is the national stadium of Chile, and is located in the Ñuñoa district of Santiago.
Relevant evidence: No