user: Question: How many roles include George Broderick in the casino 1888 theater?
Columns: ['Role', 'Savoy Theatre 1888', 'Casino Theatre 1888', 'Savoy Theatre 1897', 'Savoy Theatre 1906', 'Savoy Theatre 1909']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Lieutenant', 'Wallace Brownlow', 'George Broderick', 'Jones Hewson', 'Alec Johnstone', 'Leo Sheffield']
SQL:

assistant: SELECT COUNT("Role") FROM "Table" WHERE "Casino Theatre 1888" = 'George Broderick';