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_18 (events INTEGER, tournament VARCHAR, top_5 VARCHAR)
### Question:
What is the average event for the Open Championship Tournament, and a Top-5 less than 1?
### Answer:
SELECT AVG(events) FROM table_name_18 WHERE tournament = "the open championship" AND top_5 < 1