Table: serie_a_clubs_2007
Columns: club
city
stadium
capacity
2006_2007_season

Question: What city in the 06/07 season had cagliari and finished 16th in serie a?
SQL: SELECT "city" FROM serie_a_clubs_2007 WHERE "2006_2007_season" = '16th in serie a' AND "club" = 'cagliari'