\begin{tikzpicture}[>=stealth',line width=.1em]
  \matrix [row sep={3em}, nodes={ellipse,inner sep=0pt}]
  {
    \node (l) {\begin{tabular}{cc}\textsf{Long}\\ \cgrid{L}{}{}{}\end{tabular}}; &
    \node (n) {\begin{tabular}{cc}\textsf{No-Suffix}\\ \cgrid{}{}{N}{}\end{tabular}}; &
    \node (m) {\begin{tabular}{cc}\textsf{M-Suffix}\\ \cgrid{}{}{}{M}\end{tabular}}; &
    \node (s) {\begin{tabular}{cc}\textsf{Short}\\ \cgrid{}{S}{}{}\end{tabular}}; \\
    \node [draw,color=red,text=black,fill=red!25] (ln) {\cgrid{L}{}{N}{}}; &
    \node [draw,color=green,text=black,fill=green!25] (lm) {\cgrid{L}{}{}{M}}; &
    \node [draw,fill=green!25] (sn) {\cgrid{}{S}{N}{}}; &
    \node [draw,color=red,text=black,fill=red!25] (sm) {\cgrid{}{S}{}{M}}; \\
    \node [draw,color=green,text=black,fill=green!25] (lnm) {\cgrid{L}{}{N}{M}}; &
    \node [draw,color=red,text=black,fill=red!25] (lsn) {\cgrid{L}{S}{N}{}}; &
    \node [draw,color=green,text=black,fill=green!25] (lsm) {\cgrid{L}{S}{}{M}}; &
    \node [draw,color=red,text=black,fill=red!25] (snm) {\cgrid{}{S}{N}{M}}; \\
    \node [draw,color=yellow,text=black,fill=yellow!25] (lsnm) {\cgrid{L}{S}{N}{M}}; & & \\
  };

  \node at (3,-12) {
  \begin{tabular}{llll}
    & \clrbox{green} & \clrbox{yellow} & \clrbox{red} \\
    Fully Attested & \checkmark & & \checkmark \\
    Not Fully Attested & & \checkmark & \\
    Predicted & \checkmark & \checkmark & \\
    Not Predicted & & & \checkmark \\
  \end{tabular} };

  \draw[->] (ln.north) to (l.south);
  \draw (ln.north) to (n.south);
  \draw (lm.north) to (l.south);
  \draw (lm.north) to (m.south);
  \draw (sn.north) to (s.south);
  \draw (sn.north) to (n.south);
  \draw[->] (sm.north) to (s.south);
  \draw (sm.north) to (m.south);
  \draw[->] (lnm.north) to (ln.south);
  \draw (lnm.north) to (lm.south);
  \draw (lsn.north) to (ln.south);
  \draw (lsn.north) to (sn.south);
  \draw (lsm.north) to (lm.south);
  \draw (lsm.north) to (sm.south);
  \draw (snm.north) to (sn.south);
  \draw[->] (snm.north) to (sm.south);
  \draw[->] (lsnm.north) to (lnm.south);
  \draw[->] (lsnm.north) to (lsm.south);
\end{tikzpicture}

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