user: Question: at area 191.43 what is the total number of census ranking?
Columns: ['Official Name', 'Status', 'Area km 2', 'Population', 'Census Ranking']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Wakefield', 'Parish', '196.42', 2703.0, '1,079 of 5,008']
SQL:

assistant: SELECT COUNT("Census Ranking") FROM "Table" WHERE "Area km 2" = '191.43';