lane actor#1 "a" @4:20
lane actor#2 "b" @11:12
region seq#1 seq
step ask#1 ask "a" @4:31 lane=actor#1 region=seq#1 always
step ask#2 ask "b" @11:23 lane=actor#2 region=seq#1 always
edge ask#1 -> ask#2 data always exact
sink ask#2
