CREATE TABLE table_25251 ("Stage" FLOAT, "Winner" TEXT, "General Classification" TEXT, "Mountains Classification" TEXT, "Sprint Classification" TEXT, "Team Classification" TEXT)

Name the sprint classification being alejandro valverde
SELECT "Sprint Classification" FROM table_25251 WHERE "Winner" = 'Alejandro Valverde'
SELECT "Sprint Classification" FROM "table_25251" WHERE "Winner" = 'Alejandro Valverde'