title: Latex table: Vertically center text in one column, other columns top aligned with fixed width
body: <p>I try to vertically center a text in the first column of a latex table with unknown length of the text of other columns. The other columns should be top aligned.</p>
  
  <p>I already tried with tabular, tabularx, tabu table environment. All the approaches I have found in the internet for vertically center something are using the baseline or some kind of multirow environment.</p>
  
  <ul>
  <li><p>multirow: not working, because of the unknown number of rows generating a long text in a fixed width column.</p></li>
  <li><p>baseline: not working, because all other columns should be top aligned.</p></li>
  </ul>
  
  <pre class="lang-latex prettyprint-override"><code>\documentclass{article}
  \begin{document}
  
  \begin{tabular} {| p{2cm} p{2cm} p{2cm} |}
      \hline
      centered &amp; This is a long top aligned text, dynamically length. &amp;  This is a long top aligned text, much longer than the previous one...or shorter. Who knows what text length is given to me in my new environment. \\
      \hline
  \end{tabular}
  
  \end{document}
  </code></pre>
  
  <p>I want that the text "centered" is vertically centered in this row.</p>