echo 'digraph {

"Rikichi Yamada" -> "Denzou Yamada" [taillabel = "Father of"]
"Hansuke Doi" -> "Rikichi Yamada" [taillabel = "Friend of#"]
"Denzou Yamada" -> "Rikichi Yamada" [taillabel = "son of"]
}' | dot -Tsvg > output.svg