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_name_73 (catalog INTEGER, date VARCHAR)
### Question:
Which Catalog has a Date of july 15, 2011?
### Answer:
SELECT AVG(catalog) FROM table_name_73 WHERE date = "july 15, 2011"