Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_23718905_6 (attendance VARCHAR, stadium VARCHAR)
### Question:
How many different items appear in he attendance column at Sun Devil Stadium?
### Answer:
SELECT COUNT(attendance) FROM table_23718905_6 WHERE stadium = "Sun Devil stadium"