user: Question: what year has general nominated in the category or choice breakthrough artist?
Columns: ['Year', 'Result', 'Award', 'Category', 'Nominated work']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2008.0, 'Nominated', 'American Music Awards', 'T-Mobile Breakthrough Artist', 'General']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Nominated work" = 'general' AND "Category" = 'choice breakthrough artist';