echo 'digraph {

"Hinata Gokou" -> "Ruri Gokou" [taillabel = "Younger Sister of"]
"Tamaki Gokou" -> "Ruri Gokou" [taillabel = "Younger Sister of"]
"Ruri Gokou" -> "Hinata Gokou" [taillabel = "Younger Sister of"]
"Ruri Gokou" -> "Tamaki Gokou" [taillabel = "Younger Sister of"]
"Hinata Gokou" -> "Tamaki Gokou" [taillabel = "Younger Sister of"]
}' | dot -Tsvg > output.svg