CREATE TABLE table_51185 ("Year" FLOAT, "Theme" CLOB, "Artist" CLOB, "Mintage" CLOB, "Issue Price" CLOB)

What was the issue price for the Trumpeter Swan set?
SELECT "Issue Price" FROM table_51185 WHERE "Theme" = 'trumpeter swan'
SELECT "Issue Price" FROM "table_51185" WHERE "Theme" = 'trumpeter swan'