CREATE TABLE table_25590 ("Stage" FLOAT, "Winner" TEXT, "General classification" TEXT, "Mountains classification" TEXT, "Points classification" TEXT, "Sprints classification" TEXT, "Team classification" TEXT)

What is the mountain classification name if the winner is Bernhard Eisel?
SELECT "Mountains classification" FROM table_25590 WHERE "Winner" = 'Bernhard Eisel'
SELECT "Mountains classification" FROM "table_25590" WHERE "Winner" = 'Bernhard Eisel'