echo 'digraph {

"Ariwara no Narihira" -> "Ariwara no Yukihira" [taillabel = "Older Brother of"]
"Hiroko" -> "Ariwara no Yukihira" [taillabel = "Husband of"]
"Ariwara no Yukihira" -> "Ariwara no Narihira" [taillabel = "Younger Brother of"]
"Ariwara no Yukihira" -> "Hiroko" [taillabel = "Wife of"]
}' | dot -Tsvg > output.svg