Complex sentence: The BOK Center was in the top ten among indoor arenas worldwide in ticket sales for the first quarter of 2009 when it was the home for the city's WNBA, arena football, and hockey teams.
Split into simpler sentences: The BOK Center was in the top ten among indoor arenas worldwide in ticket sales for the first quarter of 2009. It is the home for the city's WNBA, arena football, and hockey teams.