lane actor#1 "alpha" @7:3
lane actor#2 "beta" @8:3
lane actor#3 "merger" @14:8
region seq#1 seq
step ask#1 ask "alpha" @7:18 lane=actor#1 region=seq#1 always
step ask#2 ask "beta" @8:17 lane=actor#2 region=seq#1 always
step ask#3 ask "merger" @14:24 lane=actor#3 region=seq#1 always
edge ask#1 -> ask#3 data always exact
edge ask#2 -> ask#3 data always exact
sink ask#3
