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?
Related documents: [0]  [DOC] The Estadio Ciudad de La Plata ("City of La Plata Stadium") is a multi-purpose stadium located in the city of La Plata, Argentina. It is also known popularly as the Estadio Único and is owned by the Province of Buenos Aires, administered jointly by the provincial government, the Municipality of La Plata, and the football clubs Estudiantes de La Plata and Gimnasia y Esgrima de la Plata. [END] 
[1]  [DOC] The A Head Full of Dreams Tour is the seventh concert tour currently being undertaken by British alternative rock band Coldplay, launched in support of their namesake seventh studio album "A Head Full of Dreams". Marking the band's return to large-scale venues, after the brief and intimate Ghost Stories Tour, the tour will visit stadiums and arenas across five continents. The A Head Full of Dreams Tour boasts extensive laser light and pyrotechnic visuals similar to the Mylo Xyloto Tour, and also sees a reappearance of the Xylobands as a central part of the show's visual design. The tour consists of eight legs, with a total of 123 shows across Latin America, where they performed for the first time since the Viva la Vida Tour, Europe, North America, where they embarked on their very first stadium tour of the United States, Oceania, and Asia. The first show of the tour was held at the Estadio Ciudad de La Plata in La Plata, Argentina, on 31 March 2016 and is set to conclude at the same venue on 15 November 2017. A live album covering the tour will be released in November 2017. [END] 
Answer: 
Province of Buenos Aires
Province of Buenos Aires