node source
node ask#1 "alpha" @5:31 actors=actor#1 type="string"
node ask#2 "beta" @5:63 actors=actor#2 type="string"
node ask#3 "merger" @10:24 actors=actor#3 type="string"
node sink
actor actor#1 "alpha" @5:16
actor actor#2 "beta" @5:49
actor actor#3 "merger" @10:8
edge source -> ask#1 data exact
edge source -> ask#2 data exact
edge ask#1 -> ask#3 data exact type="string"
edge ask#2 -> ask#3 data exact type="string"
edge ask#3 -> sink data exact type="string"
