user: Question: What is the average year that Idris Elba was nominated for or won an award?
Columns: ['Year', 'Actor', 'Award', 'Series', 'Result']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1967.0, 'Bill Cosby', 'Best TV Star – Male', 'I Spy', 'Nominated']
SQL:

assistant: SELECT AVG("Year") FROM "Table" WHERE "Actor" = 'Idris Elba';