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 (year INTEGER, competition VARCHAR, notes VARCHAR)
### Question:
WHAT YEAR WAS THE WORLD CHAMPIONSHIPS IN WITH NOTES OF 39.01?
### Answer:
SELECT SUM(year) FROM table_name_18 WHERE competition = "world championships" AND notes = 39.01