\begin{table*}
  \centering
  \small
  \begin{tabular}{lccccc}
    \toprule
           & Annotation &  Adjud- & External & Programming &      User \\
    System &      Types & ication & Dependencies & Language & Interface \\
    \midrule
    \slate & Classify, Link & Yes & - & Python & Terminal \\
    brat \citep{brat} & Classify, Link & Yes & apache & Python, Javascript & GUI \\
    GATE \citep{gate} & Classify, Link & Yes & - & Java & GUI \\
    YEDDA	\citep{yedda} & Classify &  - & - & Python & GUI \\
    \midrule
    ANALEC \citep{analec} & Classify, Link & - & - & Java & GUI \\
    Anafora \citep{anafora} & Classify, Link & Yes & - & Python & GUI \\
    CAT \citep{cat} & Classify & - & apache & Java & GUI \\
    Chooser \citep{chooser} & Classify, Link & - & - & C++, Python, Perl & GUI \\
    CorA \citep{cora} & Classify & - & - & PHP, JavaScript & GUI \\
    Djangology \citep{djangology} & Classify & Yes & Django & Python & GUI \\
    eHost \citep{ehost} & Classify, Link & Yes & - & Java & GUI \\
    Glozz \citep{glozz} & Classify, Link & Yes & - & Java & GUI \\
    GraphAnno \citep{graphanno} & Classify, Link & - & - & Ruby & GUI \\
    Inforex \citep{inforex} & Classify, Link & - & - & JavaScript & GUI \\
    Knowtator	\citep{knowtator} & Classify, Link & Yes & Prot\'eg\'e & Java & GUI \\
    MAE and MAI \citep{mae-mai} & Classify, Link & Yes & - & Java & GUI \\
    MMAX2 \citep{mmax} & Classify, Link & - & - & Java & GUI \\
    PALinkA \citep{palinka} & Classify, Link & - & - & Java & GUI \\
    SAWT \citep{sawt} & Classify & - & - & Python, PHP & GUI \\
    SYNC3 \citep{sync3} & Classify & Yes & Ellogon & C & GUI \\
    Stanford \citep{stanford} & Classify & - & - & Java & GUI \\
    UAM \citep{uam} & Classify & Yes & - & Java & GUI \\
    WAT-SL \citep{wat-sl} & Classify & Yes & apache & Java & GUI \\
    WebAnno \citep{webanno} & Classify, Link & Yes & - & Java & GUI \\
    WordFreak	\citep{wordfreak} & Classify, Link & Yes & - & Java & GUI \\
    \bottomrule
  \end{tabular}
  \caption{\label{tab:comparison}
  A comparison of annotation tools in terms of properties of interest (in some cases tools support extra types of annotation, \myeg syntax, that we do not consider here).
  }
\end{table*}
