node source
node ask#1 "alpha" @5:18 actors=actor#1 type="string"
node ask#2 "beta" @6:17 actors=actor#2 type="string"
node join#1 "join" @7:30 type="[string, string]"
node sink
actor actor#1 "alpha" @3:15
actor actor#2 "beta" @4:14
edge source -> ask#1 data exact
edge source -> ask#2 data exact
edge ask#1 -> join#1 data exact port=0 type="string"
edge ask#1 -> sink data exact type="string"
edge ask#2 -> join#1 data exact port=1 type="string"
edge ask#2 -> sink data exact type="string"
edge join#1 -> sink data exact port=0 type="string"
edge join#1 -> sink data exact port=1 type="string"
