echo 'digraph {

"Kenta Usui" -> "Fumio Usui" [taillabel = "Mother of"]
"Fumio Usui" -> "Kenta Usui" [taillabel = "Son of"]
"Karin Maaka" -> "Kenta Usui" [taillabel = "Husband of"]
}' | dot -Tsvg > output.svg