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_23157997_13 (stage VARCHAR, general_classification VARCHAR)
### Question:
What stage number had the general classification Rory Sutherland?
### Answer:
SELECT COUNT(stage) FROM table_23157997_13 WHERE general_classification = "Rory Sutherland"