echo 'digraph {

"Noel" -> "Frey" [taillabel = "Mother of"]
"Luna" -> "Frey" [taillabel = "Mother of"]
"Frey" -> "Noel" [taillabel = "Son of"]
"Frey" -> "Luna" [taillabel = "Daughter of"]
}' | dot -Tsvg > output.svg