echo 'digraph {

"Hades" -> "Zagreus" [taillabel = "Son of"]
"Zagreus" -> "Hades" [taillabel = "Father of"]
"Zeus" -> "Hades" [taillabel = "Older Brother of"]
"Poseidon" -> "Hades" [taillabel = "Younger Brother of"]
}' | dot -Tsvg > output.svg