CREATE TABLE table_66391 ("Year" FLOAT, "Title" TEXT, "Type" TEXT, "Label" TEXT, "Label-Nr" TEXT)

What is the earliest year with a label-Nr of st-43?
SELECT MIN("Year") FROM table_66391 WHERE "Label-Nr" = 'st-43'
SELECT MIN("Year") FROM "table_66391" WHERE "Label-Nr" = 'st-43'