What year has a Nominee of , and a Result of nominated?
CREATE TABLE table_66172 (
    "Year" real,
    "Award" text,
    "Nominee" text,
    "Episode" text,
    "Result" text
)
SELECT AVG("Year") FROM table_66172 WHERE "Nominee" = '—' AND "Result" = 'nominated'
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 year has a Nominee of , and a Result of nominated? ### Input: CREATE TABLE table_66172 (
    "Year" real,
    "Award" text,
    "Nominee" text,
    "Episode" text,
    "Result" text
) ### Response: SELECT AVG("Year") FROM table_66172 WHERE "Nominee" = '—' AND "Result" = 'nominated'