CREATE TABLE table_40540 ("Date" CLOB, "Cover model" CLOB, "Centerfold model" CLOB, "Interview subject" CLOB, "20 Questions" CLOB)

When has a Centerfold model of pilar lastra?
SELECT "Date" FROM table_40540 WHERE "Centerfold model" = 'pilar lastra'
SELECT "Date" FROM "table_40540" WHERE "Centerfold model" = 'pilar lastra'