user: Question: What is the Latitude of the Alajen Vallis named after 1997?
Columns: ['Name', 'Latitude', 'Longitude', 'Diameter (km)', 'Year named']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['Ahsabkab Vallis', '24.0S', '79.0E', 700.0, 2000.0]
SQL:

assistant: SELECT "Latitude" FROM "Table" WHERE "Year named" > 1997.0 AND "Name" = 'Alajen Vallis';