title: Underfull \hbox (badness 10000) in table
body: <p>I have the next table, but it shows the warning of the title.</p>
  <pre><code>            \begin{table}[!hbt]
              \centering
              \caption{Learning Types}
              \begin{tabular}{| p{0.14\textwidth} | p{0.42\textwidth} | p{0.34\textwidth} |}
                  
                  \hline Supervised Learning &amp; The data you feed to the algorithm is labeled.        
                                               It is often used for classification and regression  &amp;  \Centerstack{\\k-Nearest Neighbors\\Linear Regression\\
                                                                                                             Logistic Regression\\Support Vector Machines (SVMs)\\
                                                                                                             Decision Trees and Random Forests\\Neural networks\\} \tabularnewline
                  \hline Unsupervised Learning &amp; hh &amp; hh \tabularnewline
                  \hline Semi-supervised Learning &amp; hh &amp; hh \tabularnewline
                  \hline Reinforcement Learning &amp; hh &amp; hh \tabularnewline \hline
              \end{tabular}
              \end{table}
  </code></pre>
  <p>I have searched, and some people say that is because the \\ (now \tabularnewline),
  but i do not know how to make dissapear the warning.</p>