user: Question: Add up all the Ends columns that have goals smaller than 0.
Columns: ['Nat.', 'Name', 'Since', 'Goals', 'Ends', 'Transfer fee']
Types: ['text', 'text', 'text', 'real', 'real', 'text']
Sample row: ['ESP', 'Casillas ( VC )', '1999', 0.0, 2017.0, 'Youth system']
SQL:

assistant: SELECT SUM("Ends") FROM "Table" WHERE "Goals" < 0.0;