echo 'digraph {

"Riou" -> "Genkaku" [taillabel = "Adoptive father of"]
"Nanami" -> "Genkaku" [taillabel = "Adoptive father of"]
"Genkaku" -> "Riou" [taillabel = "Adopted son of"]
"Genkaku" -> "Nanami" [taillabel = "Adopted daughter of"]
}' | dot -Tsvg > output.svg