user: Question: What are the number of goals conceded that has a played greater than 18?
Columns: ['Place', 'Team', 'Played', 'Draw', 'Lost', 'Goals Scored', 'Goals Conceded', 'Points']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'C.D. Luis AngelFirpo', 18.0, 6.0, 3.0, 27.0, 19.0, 33.0]
SQL:

assistant: SELECT "Goals Conceded" FROM "Table" WHERE "Played" > 18.0;