user: Question: What is the average goals against average for those playing more than 78 games?
Columns: ['Player', 'Years', 'Games played', 'Goals allowed', 'Goals against average']
Types: ['text', 'text', 'real', 'real', 'real']
Sample row: ['John Curry', '2003-07', 107.0, 217.0, 2.07]
SQL:

assistant: SELECT AVG("Goals against average") FROM "Table" WHERE "Games played" > 78.0;