Eine bestimmte Anzahl an Kapitel ausgeben lassen

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\title{Biokunststoffe}
\subtitle{ }% Muss mindestens ein Leerzeichen enthalten 
\date{16. Juli 2021}
\author{Tim-Jonas Wechler}
\institute{Angewandte Physik\\Fachbereich {\Medium~Ingenieurwissenschaften}}

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\section{Entwicklung von Kunststoff}
    %\input{content/Geschichte.tex}
\section{Biokunststoff}
    %\input{content/Biobasiert.tex}
    %\input{content/Biologisch_Abbaubar.tex}
    %\input{content/Zertifikate}

\section{Biokunststoff in der Praxis}
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    %\input{content/Alterantiven.tex}

\section{Fazit}
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\section{Fragen und Anmerkungen}
%\slideentry{0}% Stefan: auskommentiert, weil Fehler auftritt. Das Kommando hat mehrere Argumente.
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    \frametitle{Fragen und Anmerkungen}
    Für Fragen und Anmerkungen stehe ich gerne auch nach dem Vortrag zur Verfügung.
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        \item \url{timjonas.wechler@student.hs-rm.de}
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    \tiny Alle Bilder und Quellen wurden am 15. Juli 2021 abgerufen.
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    \section{The first section}
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