\documentclass[10pt]{article}
\usepackage{pst-tree, avm}
\usepackage[left=1in, right=1in]{geometry}
\psset{levelsep=*1cm, treesep=0.25cm, nodesep=3pt, treefit=tight}
\begin{document}
\begin{tiny}
\begin{psTree}{\TR{S}}
  \begin{psTree}
    {\TR{NP}}
    \TR{it}
  \end{psTree}
  \begin{psTree}
    {\TR{VP}}
    \begin{psTree}
      {\TR{V}}
      \TR{was}
    \end{psTree}
    \begin{psTree}
      {\TR{\begin{avm} \avml\hfil NP\hfil \\ \[LOC & \@1$_{\@{i}}$\]
      \avmr\end{avm}}}
      \TR{Robin}
    \end{psTree}
    \begin{psTree}
      {\TR{\begin{avm} \avml\hfil S\hfil \\ \[SLASH & \{\@2\}\]
      \avmr\end{avm}}}
      \begin{psTree}
        {\TR{MRK}}
        \TR{that}
      \end{psTree}
      \begin{psTree}
        {\TR{\begin{avm} \avml\hfil S\hfil \\ \[SLASH & \{\@2\}\]
        \avmr\end{avm}}}
        \begin{psTree}
          {\Tfan}
          \TR{\begin{tabular}{c}we \\ persuaded \\ him$_i$\end{tabular}}
        \end{psTree}
        \begin{psTree}
          {\TR{\begin{avm} \avml\hfil VP\hfil\\ \[SLASH & \{\@2\}\]
          \avmr\end{avm}}}
          \begin{psTree}
            {\Tfan}
          \TR{\begin{tabular}{c}to \\ allow \\ us$_j$\end{tabular}}
          \end{psTree}
          \begin{psTree}
            {\TR{VP}}
            \TR{to}
            \begin{psTree}
              {\TR{\begin{avm} \avml\hfil V\hfil \\ \[ SUBJ &
                    \<\@3$_{\@j}$\> \\ COMPS & \< \@5\[LOC &
                    \@2:$ppro_{\@i}$\]\>\] \avmr\end{avm}}}
              \TR{invite}
            \end{psTree}
            \TR{\begin{avm} \avml\hfil t\hfil \\ \[LOC & \@2:$ppro_{\@i}$\]
                \avmr\end{avm}}
            \begin{psTree}
              {\Tfan}
          \TR{\begin{tabular}{c}to \\ the \\ meeting$_j$\end{tabular}}
            \end{psTree}
          \end{psTree}
        \end{psTree}
      \end{psTree}
    \end{psTree}
  \end{psTree}
\end{psTree}
\end{tiny}
\end{document}