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_26 (year INTEGER, competition VARCHAR, notes VARCHAR)
### Question:
Which Year has a Competition of european championships, and Notes of 66.81 m?
### Answer:
SELECT SUM(year) FROM table_name_26 WHERE competition = "european championships" AND notes = "66.81 m"