Legenda em subfiguras, texto em coluna dupla

Question

Gostaria de poder fazer uma pequena legenda para cada uma das figuras aqui, além da legenda do geral. Você poderia por favor me ajudar?

\documentclass[twocolumn]{article}
\usepackage{graphicx}
\usepackage{mwe}

\begin{document}

\begin{figure*}[h]
\centering
    \includegraphics[width=0.47\linewidth]{example-image}\hfil
    \includegraphics[width=0.47\linewidth]{example-image-a}\par\medskip
    \includegraphics[width=0.47\linewidth]{example-image-b}\hfil
    \includegraphics[width=0.47\linewidth]{example-image-c}
\caption{caption here}
\end{figure*}

\end{document}

Answer 1

Isso pode ser conseguido usando subfigo pacote.

MWE abaixo:

\documentclass[twocolumn]{article}
\usepackage{graphicx}
\usepackage{subfig}
\usepackage{mwe}

\begin{document}

Figure \ref{fig1} % Cross reference for the Main 

Sub Figure \ref{fig1a}--\ref{fig1f} % cross reference for the sub figures

\begin{figure*}[h]
\centering
    \subfloat[Sub-Caption a]{\fbox{\includegraphics[width=0.47\linewidth]{figure1}}\label{fig1a}}\ 
    \subfloat[Sub-Caption b]{\fbox{\includegraphics[width=0.47\linewidth]{figure2}}\label{fig1b}}\\
    \subfloat[Sub-Caption c]{\fbox{\includegraphics[width=0.47\linewidth]{figure1}}\label{fig1c}}\
    \subfloat[Sub-Caption d]{\fbox{\includegraphics[width=0.47\linewidth]{figure2}}\label{fig1d}}\\
    \subfloat[Sub-Caption e]{\fbox{\includegraphics[width=0.47\linewidth]{figure1}}\label{fig1e}}\
    \subfloat[Sub-Caption f]{\fbox{\includegraphics[width=0.47\linewidth]{figure2}}\label{fig1f}}
\caption{caption here}\label{fig1}
\end{figure*}

\end{document}

Saída: