%% 
%%  A DANTE-Edition example
%% 
%%  Example 33-01-1 on page 660.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}

\usepackage{rrgtrees}

\begin{document}
\small
\CLAUSE{
  \CORE{
    \OPR{2}{the}
    \ARG{\WORD(NP){cat}}
    \NUC{walked}
    \AAJ{
      \FanEnd{PP}{to the mat}
    }
  }
}
\end{document}