\begin{tabular}{c | c | c | c | c | c | c | c | c}
{\bf Benchmark} & {\bf PRE-20} & {\bf F1-20} & {\bf HR-20} & {\bf PRE-30} & {\bf F1-30} & {\bf HR-30} & {\bf PRE-40} & {\bf F1-40} & {\bf HR-40}\\ \hline
\end{tabular}