echo 'digraph {

"Ketil" -> "Thorgil" [taillabel = "Son of"]
"Olmar" -> "Thorgil" [taillabel = "Older Brother of"]
"Ketil" -> "Olmar" [taillabel = "Son of"]
"Thorgil" -> "Olmar" [taillabel = "Younger brother of"]
"Olmar" -> "Ketil" [taillabel = "Father of"]
"Thorgil" -> "Ketil" [taillabel = "Father of"]
}' | dot -Tsvg > output.svg