\section{Appendix}

\begin{figure}[H]
  \begin{subfigure}[H]{0.475\textwidth}
    \includegraphics[width=\linewidth]{MoonWalk/appendix_3grouped.pdf}
    \caption{3-grouped graph with a constant group size of 300, 125, 75}
    \label{fig:7a}
  \end{subfigure}\hfill
  \begin{subfigure}[H]{0.475\textwidth}
    \includegraphics[width=\linewidth]{MoonWalk/appendix_5grouped.pdf}
    \caption{5-grouped graph with constant group size of 350 (1x),125 (2x) 75 (2x)}
    \label{fig:7b}
  \end{subfigure}\hfill
  \begin{subfigure}[H]{0.475\textwidth}
    \includegraphics[width=\linewidth]{MoonWalk/appendix_10grouped_same.pdf}
    \caption{10-grouped graph with a constant group size of 150}
    \label{fig:7c}
  \end{subfigure}\hfill
  \begin{subfigure}[H]{0.475\textwidth}
    \includegraphics[width=\linewidth]{MoonWalk/appendix_10grouped_diff.pdf}
    \caption{10-grouped graph with group sizes of 400 (1x), 150 (4x) 100 (5x)}
    \label{fig:7d}
  \end{subfigure}
  \caption{Influence maximization on synthetic graphs containing more groups} 
  \label{fig:7}
\end{figure}