echo 'digraph {

"Serval" -> "Gepard" [taillabel = "Younger Brother of"]
"Lynx" -> "Gepard" [taillabel = "Older Brother of"]
"Lynx" -> "Serval" [taillabel = "Older sister of"]
"Gepard" -> "Serval" [taillabel = "Older sister of"]
"Serval" -> "Lynx" [taillabel = "Younger Sister of"]
"Gepard" -> "Lynx" [taillabel = "Younger Sister of"]
}' | dot -Tsvg > output.svg