echo 'digraph {

"Aki Hiiragi" -> "Kaede Hiiragi" [taillabel = "Younger Sister of"]
"Kaede Hiiragi" -> "Aki Hiiragi" [taillabel = "Younger Sister of"]
"Kiri Hiiragi" -> "Aki Hiiragi" [taillabel = "Younger Sister of"]
}' | dot -Tsvg > output.svg