SRL for [overran]: They [overran] the 7th Cav 's forward machine - gun positions through sheer weight of numbers , over piles of their own dead .
ARG-0: They | ARG-1: the 7th Cav 's forward machine - gun positions | ARG-M-MNR: through sheer weight of numbers | ARG-M-DIR: over piles of their own dead