user: Question: What is the maximum capacity of the Otkrytie Arena stadium?
Columns: ['Stadium', 'Capacity', 'City', 'Country', 'Tenant', 'Opening']
Types: ['text', 'real', 'text', 'text', 'text', 'real']
Sample row: ['Nou Mestalla', 75000.0, 'Valencia', 'Spain', 'Valencia CF', 2014.0]
SQL:

assistant: SELECT MAX("Capacity") FROM "Table" WHERE "Stadium" = 'Otkrytie Arena';