user: Question: What was the place in season 8 with a rank by average at 139?
Columns: ['Rank by average', 'Place', 'Perfect 40s', 'Total', 'Number of dances', 'Season', 'Average']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1', '2nd', '11', '666', '17', '10', '39.18']
SQL:

assistant: SELECT "Place" FROM "Table" WHERE "Season" = '8' AND "Rank by average" = '139';