\begin{frame}{Typical Questions}
  \begin{itemize}
    \item What is a (programming) \emph{language}?
  \smallskip
    \item How can languages be recognised by computers?\\
      \begin{itemize}
        \item \emph{automata}
        \item \emph{grammars}
        \item \emph{regular expressions}
      \end{itemize}
  \smallskip
    \item What problems can be solved by what \emph{types of automata}?\\
  \smallskip
    \item \emph{How much time/memory} is needed for solving a problem?%
  \smallskip
  \end{itemize}
  \pause\smallskip
  
  \begin{goal}{}
    Aspects of languages:
    \begin{itemize}
      \item \emph{syntax}: the \structure{form} of the words in the language
      \item \emph{semantics}: the \structure{meaning} of the words in the language
    \smallskip
    \end{itemize}
  \end{goal}
  We will focus on the syntax.
\end{frame}