user: Question: What's the diameter of Kaiwan Fluctus?
Columns: ['Name', 'Latitude', 'Longitude', 'Diameter (km)', 'Year named']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['Alpan Fluctus', '7.5S', '349.0E', 500.0, 1997.0]
SQL:

assistant: SELECT "Diameter (km)" FROM "Table" WHERE "Name" = 'Kaiwan Fluctus';