user: Question: Which Basin's Continent is south america, has a Basin Area km 2 larger than 6144727, and a Basin Area mi 2 of 238,539?
Columns: ['Basin', 'Continent', 'Drains to', 'Basin Area km 2', 'Basin Area mi 2']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Atlantic Ocean', 'multiple', 'n/a', 69800000.0, '26,900,000']
SQL:

assistant: SELECT "Basin" FROM "Table" WHERE "Continent" = 'south america' AND "Basin Area km 2" > 6144727.0 AND "Basin Area mi 2" = '238,539';