phase phase#1 "draft" @5:1
phase phase#2 "edit" @7:1
lane actor#1 "writer" @6:15
lane actor#2 "editor" @8:40
region seq#1 seq
region branch#1 branch parent=seq#1 @8:33
step ask#1 ask "writer" @6:31 lane=actor#1 phase=phase#1 region=seq#1 always
step ask#2 ask "editor" @8:56 lane=actor#2 phase=phase#2 region=branch#1 maybe
edge ask#1 -> ask#2 data maybe inexact
phase-edge phase#1 -> phase#2 data maybe
sink ask#2
