CREATE TABLE table_4509 ("STAPLE:" TEXT, "Maize / Corn [A ]" TEXT, "Rice [B ]" TEXT, "Wheat [C ]" TEXT, "Potato [D ]" TEXT, "Cassava [E ]" TEXT, "Soybean  ( Green )  [F ]" TEXT, "Sweet potato [G ]" TEXT, "Yam [Y ]" TEXT)

What is the yam amount when the Cassava amount is 0.11?
SELECT "Yam [Y ]" FROM table_4509 WHERE "Cassava [E ]" = '0.11'
SELECT "Yam [Y ]" FROM "table_4509" WHERE "Cassava [E ]" = '0.11'