what is the year built of kyrkjeb ?
CREATE TABLE table_name_20 (
    year_built INTEGER,
    sub_parish__sogn_ VARCHAR
)
SELECT AVG(year_built) FROM table_name_20 WHERE sub_parish__sogn_ = "kyrkjebø"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: what is the year built of kyrkjeb ? ### Input: CREATE TABLE table_name_20 (
    year_built INTEGER,
    sub_parish__sogn_ VARCHAR
) ### Response: SELECT AVG(year_built) FROM table_name_20 WHERE sub_parish__sogn_ = "kyrkjebø"