echo 'digraph {

"Pent" -> "Erk" [taillabel = "Apprentice of"]
"Erk" -> "Pent" [taillabel = "Teacher of"]
"Louise" -> "Pent" [taillabel = "Husband of"]
"Clarine" -> "Pent" [taillabel = "Father of"]
"Klein" -> "Pent" [taillabel = "Father of"]
"Athos" -> "Pent" [taillabel = "Apprentice of"]
}' | dot -Tsvg > output.svg