Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_51617 ( "Debut year" real, "Player" text, "Date of birth" text, "Games" real, "Goals" real, "Years at club" text )

### Question ###
what is the debut year for player terry fulton with games less than 51?

### Accurate SQL ###

SELECT AVG("Debut year") FROM table_51617 WHERE "Player" = 'terry fulton' AND "Games" < '51'