\begin{frame}
  \frametitle{RW Conflicts}
  
  \begin{goal}{}
    There is a \emph{RW conflict} between $T_1$ and $T_2$ if there is an item Y:
    \begin{itemize}
      \item $T_1$ reads Y and afterwards, $T_2$ writes Y
    \end{itemize}
  \end{goal}
  This read becomes \emph{unrepeatable}.
  \bigskip
  \pause
  
  \begin{quiz}{\textwidth}{Find all RW conflicts in the following schedule}
    \begin{tcenter}
      \begin{tikzpicture}
        \schedule{}{3}{2rV!1+1|3wV!1+1|1wY|2rY|2wZ|2rV}
      \end{tikzpicture}
    \end{tcenter}
  \end{quiz}
\end{frame}