node source
node ask#1 "w" @7:25 actors=actor#1 type="string"
node ask#2 "r" @19:30 actors=actor#2 type="string"
node sink
actor actor#1 "w" @7:14
actor actor#2 "r" @19:19
edge source -> ask#1 data exact
edge ask#1 -> ask#2 data inexact type="string"
edge ask#2 -> sink data exact type="string"
