CREATE TABLE table_41517 ("Date" CLOB, "Cover model" CLOB, "Centerfold model" CLOB, "Interview subject" CLOB, "20 Questions" CLOB)

Who was the 20 Questions section aimed at when Cover Model was Kimberley Conrad Hefner?
SELECT "20 Questions" FROM table_41517 WHERE "Cover model" = 'kimberley conrad hefner'
SELECT "20 Questions" FROM "table_41517" WHERE "Cover model" = 'kimberley conrad hefner'