user: ### NOW ANSWER:
Question: What is the diameter of the feature with longitude 8.0E?
Columns: ['Name', 'Latitude', 'Longitude', 'Diameter (km)', 'Year named', 'Name origin']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Aegina Farrum', '35.5N', '20.9E', '60.0', 1994.0, 'Greek river nymph.']
SQL:

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