echo 'digraph {

"King Louis XV" -> "Queen Marie" [taillabel = "Wife of"]
"Dauphin Auguste" -> "Queen Marie" [taillabel = "Grandmother of"]
"Queen Marie" -> "King Louis XV" [taillabel = "Husband of"]
"Dauphin Auguste" -> "King Louis XV" [taillabel = "Grandfather of"]
"King Louis XV" -> "Dauphin Auguste" [taillabel = "Grandson of"]
"Queen Marie" -> "Dauphin Auguste" [taillabel = "Grandson of"]
}' | dot -Tsvg > output.svg