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_15739098_1 (episode VARCHAR, story VARCHAR)
### Question:
Name the number of episodes for alan nourse
### Answer:
SELECT COUNT(episode) FROM table_15739098_1 WHERE story = "Alan Nourse"