lane actor#1 "alpha" @6:3
lane actor#2 "beta" @7:3
lane actor#3 "merger" @9:46
region seq#1 seq
region branch#1 branch parent=seq#1 @9:34
step ask#1 ask "alpha" @6:18 lane=actor#1 region=seq#1 always
step ask#2 ask "beta" @7:17 lane=actor#2 region=seq#1 always
step ask#3 ask "merger" @9:62 lane=actor#3 region=branch#1 maybe
edge ask#1 -> ask#3 data maybe inexact
edge ask#2 -> ask#3 data maybe inexact
sink ask#3
