\begin{tikzpicture}[>=stealth']
  \matrix[column 1/.style={nodes={text width=9em,text ragged}}] at (-3,-1)
  {
    \node {$\mathsf{simple}\leq \mathsf{position1}$}; \\
    \node {$\mathsf{past}\leq \mathsf{position1}$}; \\
    \node {$\mathsf{near}\leq \mathsf{position1}$}; \\
  };
  \node (ded) at (0,-2) {$\mathsf{simple}$};
  \node (ened) at (2,-2) {$\mathsf{past}$};
  \node (ened2) at (4,-2) {$\mathsf{near}$};
  \node (dened) at (2,0) {$\mathsf{position1}$};

  \draw[<-] (dened) to (ded);
  \draw[<-] (dened) to (ened2);
  \draw[<-] (dened) to (ened);
\end{tikzpicture}

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