user: Question: What is the sum of Blank Ends for denmark when less than 42 is the ends lost?
Columns: ['Nation', 'Skip', 'Ends Won', 'Ends Lost', 'Blank Ends', 'Stolen Ends', 'Shot Pct.']
Types: ['text', 'text', 'real', 'real', 'real', 'real', 'text']
Sample row: ['Sweden', 'Anette Norberg', 41.0, 36.0, 14.0, 11.0, '79%']
SQL:

assistant: SELECT SUM("Blank Ends") FROM "Table" WHERE "Nation" = 'denmark' AND "Ends Lost" < 42.0;