CREATE TABLE table_27791 ("Stage" FLOAT, "Winner" TEXT, "General Classification" TEXT, "Mountains Classification" TEXT, "Sprint Classification" TEXT, "Young Rider Classification" TEXT, "Team Classification" TEXT, "Aggressive Rider" TEXT)

What was the young rider classification when manuel cardoso was the winner?
SELECT "Young Rider Classification" FROM table_27791 WHERE "Winner" = 'Manuel Cardoso'
SELECT "Young Rider Classification" FROM "table_27791" WHERE "Winner" = 'Manuel Cardoso'