SRL for [canalized]: ... the travertine embankment walls of the late 19th century effectively [canalized] the whole Tiber much as the Cloaca canalized the forum stream ...
ARG-0: the travertine embankment walls of the late 19th century | ARG-M-ADV: effectively | ARG-1: the whole Tiber | ARG-M-ADV: much as the Cloaca canalized the forum stream