echo 'digraph {

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