echo 'digraph {

"Boyd" -> "Rolf" [taillabel = "Half-brother of"]
"Oscar" -> "Rolf" [taillabel = "Half-brother of"]
"Oscar" -> "Boyd" [taillabel = "younger brother of"]
"Rolf" -> "Boyd" [taillabel = "Half-brother of"]
"Boyd" -> "Oscar" [taillabel = "Older Brother of"]
"Rolf" -> "Oscar" [taillabel = "Half-brother of"]
}' | dot -Tsvg > output.svg