CREATE TABLE table_20957 ("Country" CLOB, "Skip" CLOB, "W" FLOAT, "L" FLOAT, "PF" FLOAT, "PA" FLOAT, "Ends Won" FLOAT, "Ends Lost" FLOAT, "Blank Ends F/A" CLOB, "Stolen Ends For" FLOAT, "Stolen Ends Against" FLOAT, "Shot %" FLOAT)

How many stolen ends against where there when Thomas Dufour was skip?
SELECT "Stolen Ends Against" FROM table_20957 WHERE "Skip" = 'Thomas Dufour'
SELECT "Stolen Ends Against" FROM "table_20957" WHERE "Skip" = 'Thomas Dufour'