user: Question: What is the total area with the census ranking of 3,129 of 5,008, and a Population smaller than 460?
Columns: ['Official Name', 'Status', 'Area km 2', 'Population', 'Census Ranking']
Types: ['text', 'text', 'real', 'real', 'text']
Sample row: ['Moncton', 'Parish', 582.2, 8861.0, '427 of 5,008']
SQL:

assistant: SELECT SUM("Area km 2") FROM "Table" WHERE "Census Ranking" = '3,129 of 5,008' AND "Population" < 460.0;