List of indoor arenas in Europe

Columns: Arena | Capacity | Opened | Location | Country
Mercedes-Benz Arena Berlin | 17,400 | 2008 | Berlin | Germany | Halle Tony Garnier | 15,000 | 1988 | Lyon | France | Ziggo Dome | 17,200 | 2012 | Amsterdam | Netherlands | Westfalenhallen | 16,500 | 1952 | Dortmund | Germany | Rotterdam Ahoy | 16,426 | 1950 | Rotterdam | Netherlands | Royal Arena | 16,100 | 2017 | Copenhagen | Denmark

Example questions:
What is the capital of the European country where the Pala Alpitour indoor arena is located ? | The European indoor arena which is the second most-visited event hall in the world opened in what year ? | What is the capacity of the European indoor arena located in Germany 's eighth-largest city ? | What indoor arena is located in the European city that is the capital of Catalonia ?

Answers:
Rome | 1933 | 16,500 | Palau Sant Jordi