echo 'digraph {

"Kou Ichinomiya" -> "Seki Ichinomiya" [taillabel = "Father of"]
"Seki Ichinomiya" -> "Kou Ichinomiya" [taillabel = "Son of"]
"Nino" -> "Kou Ichinomiya" [taillabel = "Boyfriend of"]
}' | dot -Tsvg > output.svg