user: Question: What's the sum of years when the Artist of the queen were less than 1?
Columns: ['Year', 'Artist', 'Album', 'Record label', 'Weeks at number one']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1990.0, 'Madonna', 'The Immaculate Collection', 'Sire', 9.0]
SQL:

assistant: SELECT SUM("Year") FROM "Table" WHERE "Artist" = 'queen' AND "Weeks at number one" < 1.0;