\documentclass[11pt]{llncs}

\begin{document}
\title{Title}
%
\author{First Author\inst{1,2} \and 
        Second Author\inst{2} \and 
        Third Author\inst{1,3}}
%
\institute{Affiliation1 \and
Affiliation 2 \and
Affiliation 3}

\maketitle       
\begin{abstract}
insert abstract here
\end{abstract}

\section{}
% Put \label in argument of \section for cross-referencing
%\section{\label{}}
\subsection{}
\subsubsection{}

\section{}
\subsection{}
\subsection{}

\section{}


\begin{thebibliography}{000}

\bibitem{bib1}

\bibitem{bib2}

\bibitem{bib3}

\end{thebibliography}
\end{document}
