SELECT AVG(year) FROM table_name_92 WHERE result = "nominated" AND film_series = "thirst" AND award = "best actress" AND group = "baeksang arts awards"
What is the average year in which Kim was nominated for Thirst as Best Actress at the Baeksang Arts Awards?
CREATE TABLE table_name_92 (
    year INTEGER,
    group VARCHAR,
    award VARCHAR,
    result VARCHAR,
    film_series VARCHAR
)