user: Question: Which Year saw the Production of Wicked at the Helpmann Awards Award ceremony?
Columns: ['Year', 'Award ceremony', 'Role', 'Production', 'Result']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2008.0, 'Green Room Awards', 'Glinda', 'Wicked', 'Nominated']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Production" = 'Wicked' AND "Award ceremony" = 'Helpmann Awards';