echo 'digraph {

"Minerva" -> "Michalis" [taillabel = "Older Brother of"]
"Maria" -> "Michalis" [taillabel = "Older Brother of"]
"Michalis" -> "Maria" [taillabel = "Younger Sister of"]
"Minerva" -> "Maria" [taillabel = "Younger Sister of"]
"Michalis" -> "Minerva" [taillabel = "Younger Sister of"]
"Maria" -> "Minerva" [taillabel = "Older sister of"]
}' | dot -Tsvg > output.svg