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\begin{table}[tbp]
  \begin{center}
    \begin{tabular}{|l@{\slug}l@{\slug}r|}
      \hhline{|---|}
      \multicolumn{3}{|l|}{\textbf{Input from SC to AA}}\\
      \multicolumn{2}{|l}{Number of \texttt{.arc.gz} files} & 5\\
      \multicolumn{2}{|l}{Total compressed size} & 441~MB\\
      \multicolumn{2}{|l}{Number of documents}  & 250~k\\
      \hhline{|---|}
      \multicolumn{3}{|l|}{\textbf{Preprocessing}}\\
      Suppressed &  HTTP status & 49k\\
      & unwanted provider IDs & 5k\\
      & empty documents & 3k\\
      & duplicates reduced & 23k\\
      %& faulty XML & $<30$\\
      \hhline{|---|}
      \multicolumn{3}{|l|}{\textbf{Preprocessing results}}\\
      Documents & HTML &     37k\\
      & WSDL &     110k\\
      & abstract & 25k\\
      \hhline{|~~-|}
      \multicolumn{2}{|c}{total (31\% reduction)} &    173k\\
      \hhline{|---|}
      \multicolumn{3}{|l|}{\textbf{Output from AA to CIM}}\\
      \multicolumn{2}{|l}{Number of RDF-XML files} & 30\\
      \multicolumn{2}{|l}{Total compressed size} & 40~MB\\
      \multicolumn{2}{|l}{Number of RDF triples} & 4.5~M\\
      \multicolumn{2}{|l}{Number of Providers} & 8700\\
      \multicolumn{2}{|l}{Number of Services} & 25~000\\
      \hhline{|---|}
    \end{tabular}
  \end{center}
  \caption{Typical AA input, preprocessing, and output}
  \label{tab:input-output}
\end{table}
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