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_13258823_2 (opponent VARCHAR, game_site VARCHAR)
### Question:
Name the number of opponent with arrowhead stadium
### Answer:
SELECT COUNT(opponent) FROM table_13258823_2 WHERE game_site = "Arrowhead Stadium"