SRL for [stem]: He could n't stand on the top ski and separate out the processes involved and so ended up using two legs to make a [stem] again before then standing on the top ski - which of course changed nothing .
ARG-0: He | ARG-M-LVB: make | ARG-M-TMP: again | ARG-M-TMP: before then standing on the top ski - which of course changed nothing