digraph untitled
	{
	    node a [label="CP"]
	    node b [label=""]
		node c [label="C'"]
		node d [label="C"]
	    node e [label="TP"]
		node f [label=""]
		node g [label="T'"]
	    node h [label="T"]
		node i [label="VP"]
		node j [label="DP"]
	    node k [label="John"]
		node l [label="V'"]
	    node m [label="V"]
	    node n [label="DP"]
		node o [label="CP"]
		node p [label=""]
	    node q [label="C'"]
		node r [label="C"]
		node s [label="TP"]
	    node t [label=""]
		node u [label="T'"]
		node v [label="T"]
	    node w [label="VP"]
		node x [label=""]
	    node y [label="V'"]
	    node z [label="V"]
		node aa [label="CP"]
		node ab [label=""]
	    node ac [label="C'"]
		node ad [label="C"]
		node ae [label="TP"]
	    node af [label=""]
		node ag [label="T'"]
		node ah [label="T"]
	    node ai [label="VP"]
		node aj [label="DP"]
	    node ak [label="The Doctor"]
	    node al [label="V'"]
		node am [label="V'"]
		node an [label="V"]
		node ao [label="DP"]
	    node ap [label="how"]
		node aq [label="PP"]
		node ar [label="by Mary"]
		a -> b;
		a -> c;
		c -> d;
		c -> e;
		e -> f;
		e -> g;
		g -> h;
		g -> i;
		i -> j;
		i -> l;
		j -> k;
		l -> m;
		l -> n;
		l -> o;
		o -> p;
		o -> q;
		q -> r;
		q -> s;
		s -> t;
		s -> u;
		u -> v;
		u -> w;
		w -> x;
		w -> y;
		y -> z;
		y -> aa;
		aa -> ab;
		aa -> ac;
		ac -> ad;
		ac -> ae;
		ae -> af;
		ae -> ag;
		ag -> ah;
		ag -> ai;
		ai -> aj;
		ai -> al;
		aj -> ak;
		al -> am;
		am -> an;
		am -> ao;
		ao -> ap;
		al -> aq;
		aq -> ar;

	}