lane actor#1 "critic" @4:16
region seq#1 seq
step ask#1 ask "critic" @5:19 lane=actor#1 region=seq#1 always
step ask#2 ask "critic" @6:19 lane=actor#1 region=seq#1 always
edge ask#1 -> ask#2 fifo always
sink ask#1,ask#2
