List of indoor arenas in Europe

Columns: Arena | Capacity | Ground breaking | Opening | Location | Country
Hala Narodowa | 24,000 | 2017 | 2020 | Warsaw | Poland | MSG Sphere London | 21,500 | TBD | TBD | London | United Kingdom | Arena Polivalentă | 20,000 | 2019 | 2022 | Bucharest | Romania | YTL Arena Bristol | 17,000 | TBD | 2022 | Bristol | United Kingdom | Sala Polivalentă | 16,000 | 2020 | 2022 | Timișoara | Romania | New Cardiff Bay Arena | 15,000 | TBD | TBD | Cardiff | United Kingdom | Arena Santa Giulia | 15,000 | TBD | TBD | Milan | Italy

Example questions:
On what river is the city that hosts the indoor arena with the largest capacity in Romania on ? | What was the population in 2011 of the city in England that has the smallest capacity ? | On what river is the city where the largest indoor arena in the United Kingdom will be found ? | In what continent would you find the indoor arena that can hold 11,000 people ? | What is the nickname of the indoor arena that has the greatest capacity ?

Answers:
Dâmbovița River | 120,046 | River Thames | Europe | Paris of the North