echo 'digraph {

"Louis XV" -> "Madame du Barry" [taillabel = "Master of"]
"Louis XVI" -> "Louis XV" [taillabel = "Grandfather of"]
"Marie Antoinette" -> "Louis XV" [taillabel = "Grandfather of"]
"Louis Joseph de France" -> "Louis XV" [taillabel = "Grandfather of"]
}' | dot -Tsvg > output.svg