CREATE TABLE table_2522473_1 (home_city VARCHAR2, home_ground VARCHAR2)

What is the home city for the team whose home ground is dnb nor arena?
SELECT home_city FROM table_2522473_1 WHERE home_ground = "DnB Nor Arena"
SELECT "home_city" FROM "table_2522473_1" WHERE "DnB Nor Arena" = "home_ground"