user: Question: How many runners-up were there when Joanne Wheatley won?
Columns: ['Series', 'Premiere', 'Finale', 'Runners-up', 'Winner']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, '17 August 2010', '21 September 2010', 'Miranda Gore Browne', 'Edd Kimber']
SQL:

assistant: SELECT COUNT("Runners-up") FROM "Table" WHERE "Winner" = 'Joanne Wheatley';