user: Question: At which ground did Dirk Nannes have a figure of 4/23?
Columns: ['Player', 'Overs', 'Figures', 'Opponent', 'Ground']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Ben Edmondson (Western Australia)', 4.0, '4/14', 'South Australia', 'Adelaide Oval']
SQL:

assistant: SELECT "Ground" FROM "Table" WHERE "Figures" = '4/23';