\begin{overpic}[width=0.49\textwidth]{tour7}
\put(1,74){\colorbox{white}{(\sublabel{tour7}) \href{http://dream.misasa.okayama-u.ac.jp/?q=20210114062313-799139}{tour7}}}
%%(\subref{tour7}) \href{tour7}
\color{red}
\end{overpic}
<?xml version="1.0" encoding="UTF-8"?>
<acquisitions>
</acquisitions>