user: Question: What is Petersville's census ranking?
Columns: ['Official Name', 'Status', 'Area km 2', 'Population', 'Census Ranking']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Chipman', 'Parish', '482.81', 962.0, '2,135 of 5,008']
SQL:

assistant: SELECT "Census Ranking" FROM "Table" WHERE "Official Name" = 'Petersville';