
\begin{figure*}[!b]
\begin{center}
\begin{tabular}{p{1in}|c|c}
PCA ($D*T^2$)& \includegraphics[width=2.2in]{figures/ap203_pca3.pdf} &
\includegraphics[width=2.2in]{figures/ap214_pca3.pdf}\\\hline
FASTMAP ($2N$) & \includegraphics[width=2.2in]{figures/ap203_fastmap3.pdf} &
\includegraphics[width=2.2in]{figures/ap214_fastmap3.pdf}\\\hline
Tf*IDF ($t*N$) & \includegraphics[width=2.5in]{figures/ap203_tfidf3.pdf} &
\includegraphics[width=2.2in]{figures/ap214_tfidf3.pdf}
\end{tabular}
\end{center}
\caption{What is lost by heuristic exploration. }\label{fig:found}
\end{figure*}
