user: Question: Tell me the overall rank for Roland Schoeman
Columns: ['Heat Rank', 'Lane', 'Swimmer', 'Country', 'Time', 'Overall Rank']
Types: ['real', 'real', 'text', 'text', 'real', 'text']
Sample row: [1.0, 4.0, 'Roland Schoeman', 'South Africa', 23.49, '2']
SQL:

assistant: SELECT "Overall Rank" FROM "Table" WHERE "Swimmer" = 'Roland Schoeman';