CREATE TABLE table_27758 ("Stage" FLOAT, "Winner" TEXT, "General classification" TEXT, "Points classification" TEXT, "Mountains classification" TEXT, "Combination Classification" TEXT, "Team classification" TEXT)

Who was awarded mountains classification when Alessandro petacchi won?
SELECT "Mountains classification" FROM table_27758 WHERE "Winner" = 'Alessandro Petacchi'
SELECT "Mountains classification" FROM "table_27758" WHERE "Winner" = 'Alessandro Petacchi'