echo 'digraph {

"Kiritan Tohoku" -> "Itako Tohoku" [taillabel = "Older Sister"]
"Zunko Tohoku" -> "Itako Tohoku" [taillabel = "Older Sister"]
"Itako Tohoku" -> "Zunko Tohoku" [taillabel = "Younger Sister of"]
"Kiritan Tohoku" -> "Zunko Tohoku" [taillabel = "Older sister of"]
"Itako Tohoku" -> "Kiritan Tohoku" [taillabel = "Younger Sister of"]
"Zunko Tohoku" -> "Kiritan Tohoku" [taillabel = "Younger Sister of"]
}' | dot -Tsvg > output.svg