name the military unit whose garrison is litochoro and command structure is 2nd mechanized infantry division ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_garrison dbr_Litochoro sep_dot var_uri dbo_commandStructure dbr_2nd_Mechanized_Infantry_Division_ attr_open Greece attr_close sep_dot var_uri a dbo_MilitaryUnit brack_close