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1\documentclass[11pt]{article}2\usepackage[T1]{fontenc}3\usepackage{graphicx}4\begin{document}5\section{First}\label{sec:first}6See Figure~\ref{fig:missing} and the work of \cite{nobody2099}.7A known source is \cite{darwin1898}.89\input{sections/body}1011\section{Second}\label{sec:first}12Nothing refers to this section.13\begin{figure}[ht]14\centering15\rule{3cm}{1cm}16\caption{A figure nobody refers to.}\label{fig:orphan}17\end{figure}1819\bibliographystyle{plain}20\bibliography{refs}21\end{document}22