echo 'digraph {

"Twilight Sparkle" -> "Shining Armor" [taillabel = "Older Brother of"]
"Princess Cadance" -> "Shining Armor" [taillabel = "Husband of"]
"Shining Armor" -> "Princess Cadance" [taillabel = "Wife of"]
"Shining Armor" -> "Twilight Sparkle" [taillabel = "Younger Sister of"]
}' | dot -Tsvg > output.svg