digraph G {
	parse_c [label="parse.c"];
	parse_h [label="parse.h"];
	parse_y [label="parse.y"];
	cmd [label="bison [some arguments maybe, I dunno] parse.y" shape="rectangle"];
	parse_c -> {cmd} [dir="back"];
	parse_h -> {cmd} [dir="back"];
	cmd -> parse_y [dir="back"];
}
