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_97 (year INTEGER, venue VARCHAR)
### Question:
What is the average year of events that took place in Antwerp, Belgium?
### Answer:
SELECT AVG(year) FROM table_name_97 WHERE venue = "antwerp, belgium"