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 (first_elected INTEGER, incumbent VARCHAR)
### Question:
What is John Shadegg's First Elected date?
### Answer:
SELECT AVG(first_elected) FROM table_name_18 WHERE incumbent = "john shadegg"