echo 'digraph {

"Rias Gremory" -> "Issei Hyoudou" [taillabel = "In love with"]
"Akeno Himejima" -> "Rias Gremory" [taillabel = "Friend of"]
"Issei Hyoudou" -> "Rias Gremory" [taillabel = "In love with"]
"Sir Zechs Lucifer" -> "Rias Gremory" [taillabel = "Younger Sister of"]
}' | dot -Tsvg > output.svg