echo 'digraph {

"Langobalt" -> "Lex" [taillabel = "son of"]
"Lex" -> "Langobalt" [taillabel = "Father of"]
"Johan" -> "Langobalt" [taillabel = "grandfather of"]
"Johalva" -> "Langobalt" [taillabel = "grandfather of"]
}' | dot -Tsvg > output.svg