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_name_47 (goals__2008_ INTEGER, games__2008_ VARCHAR, debut_round VARCHAR)

### Question ###
What is the average number of goals with 21 games for a debut round less than 1?

### Accurate SQL ###

SELECT AVG(goals__2008_) FROM table_name_47 WHERE games__2008_ = 21 AND debut_round < 1