echo 'digraph {

"Clark Triton" -> "Luke Triton" [taillabel = "Son of"]
"Clive Dove" -> "Luke Triton" [taillabel = "the past self of"]
"Luke Triton" -> "Clive Dove" [taillabel = "Future self of "]
"Luke Triton" -> "Clark Triton" [taillabel = "Father of"]
}' | dot -Tsvg > output.svg