node source
node join#1 "join" @5:28 type="[string, string]"
node ask#1 "a" @5:44 actors=actor#1 type="string"
node ask#2 "b" @5:73 actors=actor#2 type="string"
node sink
actor actor#1 "a" @5:33
actor actor#2 "b" @5:62
edge source -> ask#1 data exact
edge source -> ask#2 data exact
edge join#1 -> sink data exact type="[string, string]"
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"
