user: Question: How many persons had immunity in the episode when Wanda was eliminated?
Columns: ['Episode title', 'Air date', 'Reward', 'Immunity', 'Eliminated', 'Vote', 'Finish']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['" This Has Never Happened Before! "', 'February 17, 2005', 'None', 'Ian', 'Jonathan', 'No Vote', 'Eliminated Day 2']
SQL:

assistant: SELECT COUNT("Immunity") FROM "Table" WHERE "Eliminated" = 'Wanda';