Which week is the theme n/a
CREATE TABLE table_21501518_1 (week__number VARCHAR, theme VARCHAR)
SELECT week__number FROM table_21501518_1 WHERE theme = "N/A"
### Context: CREATE TABLE table_21501518_1 (week__number VARCHAR, theme VARCHAR) ### Question: Which week is the theme n/a ### Answer: SELECT week__number FROM table_21501518_1 WHERE theme = "N/A"