digraph G {
    margin=0;
    c [style=bold, label="obligate-01"];
    {rank=same;
	neg [label="-"];
    l [label="leave-01"];
	}
    
    raven;
	
    c->l [label="ARG1"];
    l->neg [label="polarity"];
    l->raven [label="ARG0"];
}
