Question: A Head Full of Dreams Tour is the seventh tour by Coldplay, and which had it's first show at a stadium that is known as Estadio Unico and is owned by who?
Sentence (from "Estadio Ciudad de La Plata"): The Estadio Ciudad de La Plata ("City of La Plata Stadium") is a multi-purpose stadium located in the city of La Plata, Argentina.
Relevant evidence: No