CREATE TABLE table_3438 ("Stage" FLOAT, "Winner" TEXT, "General Classification" TEXT, "Mountains Classification" TEXT, "Sprint Classification" TEXT, "Team Classification" TEXT)

What is the earliest stage where mountains classifications was awarded to Peter Stetina?
SELECT MIN("Stage") FROM table_3438 WHERE "Mountains Classification" = 'Peter Stetina'
SELECT MIN("Stage") FROM "table_3438" WHERE "Mountains Classification" = 'Peter Stetina'