What is the average Year, when Country is 'U.S.', and when Location is 'Edmond , OK'?
CREATE TABLE table_name_28 (
    year INTEGER,
    country VARCHAR,
    location VARCHAR
)
SELECT AVG(year) FROM table_name_28 WHERE country = "u.s." AND location = "edmond , ok"
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 average Year, when Country is 'U.S.', and when Location is 'Edmond , OK'? ### Input: CREATE TABLE table_name_28 (
    year INTEGER,
    country VARCHAR,
    location VARCHAR
) ### Response: SELECT AVG(year) FROM table_name_28 WHERE country = "u.s." AND location = "edmond , ok"