Table schema:
CREATE TABLE table_name_6 (debut_year INTEGER, goals VARCHAR, games VARCHAR, years_at_club VARCHAR)

Question: What is the debut year for the player with fewer than 54 games, fewer than 8 goals and 1989 at club?
SQL: SELECT AVG(debut_year) FROM table_name_6 WHERE games < 54 AND years_at_club = "1989" AND goals < 8