Trying to teleport a zombie, error?

ServerScriptService.EventScript:11: invalid argument #3 (Vector3 expected, got string)

 while wait(5) do
    local event = math.random(1, 3)
    if event == 1 then
        print(1)
        game.StarterGui.EventGui.Frame.TextLabel.Text = "Wrath Takes Hold."
        local Wrath1 = game.ReplicatedStorage.Folder.Zombie:Clone()
        local Wrath2 = game.ReplicatedStorage.Folder.Zombie:Clone()
        local Wrath3 = game.ReplicatedStorage.Folder.Zombie:Clone()
        local Wrath4 = game.ReplicatedStorage.Folder.Zombie:Clone()
        Wrath1.Parent = workspace
        Wrath1.HumanoidRootPart.Position = "-633.383, -6.904, 189.149"

    else
        if event == 2 then
            print(2)
        else
            if event == 3 then
                print(3)
            end
        end
    end
end