CREATE TABLE table_name_67 (year NUMBER, notes VARCHAR2, director VARCHAR2)

Notes of bbc radio 4, and a Director of peter kavanagh includes which average year?
SELECT AVG(year) FROM table_name_67 WHERE notes = "bbc radio 4" AND director = "peter kavanagh"
SELECT AVG("year") FROM "table_name_67" WHERE "bbc radio 4" = "notes" AND "director" = "peter kavanagh"