\begin{table}[htb]
\caption{Summary of dataset splits: $\traindata$ to train $\targetmodel$, $\testdata$ to evaluate $\targetmodel$, $\auxtraindata$ to train $\attackmodel$, and $\auxtestdata$ to evaluate $\attackmodel$.}
\footnotesize
\begin{center}
\begin{tabular}{ l | c | c | c | c}
\hline
 \textbf{Dataset} & $\traindata$ & $\testdata$ & $\auxtraindata$ &  $\auxtestdata$\\ 
 \hline
 \textbf{\census} & 24,752 & 6,188 & 4,950 & 1,238 \\  
 \textbf{\compas} & 4,937 & 1,235 & 988 & 247\\ 
 \textbf{\meps} & 12,664 & 3,166 & 2,532 & 634\\ 
 \textbf{\lfw} & 10514 & 2629 & 2103 & 526\\ 
 \hline
\end{tabular}
\end{center}
\label{tab:summary}
\end{table}