lane actor#1 "scan" @2:22
lane actor#2 "act" @4:8
region seq#1 seq
step ask#1 ask "scan" @2:36 lane=actor#1 region=seq#1 always
step ask#2 ask "act" @4:21 lane=actor#2 region=seq#1 always
edge ask#1 -> ask#2 data always exact
sink ask#2
