user: ### NOW ANSWER:
Question: What is the sum of the weeks on a chart a song with a position less than 1 haas?
Columns: ['Year', 'Single', 'Chart', 'Position', 'Weeks on chart']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1977.0, '"Ma Baker"', 'UK single chart', 2.0, 13.0]
SQL:

assistant: SELECT SUM("Weeks on chart") FROM "Table" WHERE "Position" < 1.0;