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_21696800_1 (_number VARCHAR, directed_by VARCHAR)
### Question:
How many different episode numbers are there for episodes directed by Wayne Rose?
### Answer:
SELECT COUNT(_number) FROM table_21696800_1 WHERE directed_by = "Wayne Rose"