<question>: What is the number of Years at Club for the player who has had more games than 28, more Goals than 225, and his Debut year was after 1950? <context>: CREATE TABLE table_name_77 (years_at_club VARCHAR, debut_year VARCHAR, games VARCHAR, goals VARCHAR)
SELECT years_at_club FROM table_name_77 WHERE games > 28 AND goals > 225 AND debut_year > 1950