echo 'digraph {

"Tama Yagami" -> "Tsurugi Yagami" [taillabel = "Sister of"]
"Kagami Yagami" -> "Tsurugi Yagami" [taillabel = "Sister of"]
"Tsurugi Yagami" -> "Kagami Yagami" [taillabel = "Sister of"]
"Tama Yagami" -> "Kagami Yagami" [taillabel = "Sister of"]
"Kagami Yagami" -> "Tama Yagami" [taillabel = "Sister of"]
"Tsurugi Yagami" -> "Tama Yagami" [taillabel = "Sister of"]
}' | dot -Tsvg > output.svg