user: Question: How long is the diameter that has a longitude of 8.0E?
Columns: ['Name', 'Latitude', 'Longitude', 'Diameter (km)', 'Year named']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['Aegina Farrum', '35.5N', '20.9E', 60.0, 1994.0]
SQL:

assistant: SELECT "Diameter (km)" FROM "Table" WHERE "Longitude" = '8.0E';