what is the debut year for player terry fulton with games less than 51?
CREATE TABLE table_51617 (
    "Debut year" real,
    "Player" text,
    "Date of birth" text,
    "Games" real,
    "Goals" real,
    "Years at club" text
)
SELECT AVG("Debut year") FROM table_51617 WHERE "Player" = 'terry fulton' AND "Games" < '51'
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 is the debut year for player terry fulton with games less than 51? ### Input: CREATE TABLE table_51617 (
    "Debut year" real,
    "Player" text,
    "Date of birth" text,
    "Games" real,
    "Goals" real,
    "Years at club" text
) ### Response: SELECT AVG("Debut year") FROM table_51617 WHERE "Player" = 'terry fulton' AND "Games" < '51'