\begin{figure}[!htb]
    \centering
    \begin{minipage}[b]{1\linewidth}
    \centering
   \subfigure[CENSUS]{
   \includegraphics[width=0.49\linewidth]{ACSAC/figures/advdebias/census/census_advdeb_utility.pdf}
   }%
    \subfigure[COMPAS]{
    \includegraphics[width=0.49\linewidth]{ACSAC/figures/advdebias/compas/compas_advdeb_utility.pdf}
    }
    \end{minipage}\\
   \begin{minipage}[b]{1\linewidth}
   \centering
   \subfigure[MEPS]{
   \includegraphics[width=0.49\linewidth]{ACSAC/figures/advdebias/meps/meps_advdeb_utility.pdf}
   }%
    \subfigure[LFW]{
    \includegraphics[width=0.49\linewidth]{ACSAC/figures/advdebias/lfw/lfw_advdeb_utility.pdf}
    }
   \end{minipage}
    \caption{Utility degradation }
    \label{fig:utilityAdvDebias2}
\end{figure}