
\begin{table*}[t]
\centering
\setlength\tabcolsep{2pt}
\footnotesize
\begin{tabular}{@{}lL{70pt}ccL{210pt}c@{}}
\toprule
\textbf{Feature in JSON} & \textbf{Feature} & \textbf{Type} & \textbf{Example} & \textbf{Description} & \textbf{Used} \\ \midrule \arrayrulecolor{gray!30}
\textbf{nuc\_children} & Nucleus' Children & Num. & 2 & No. of discourse units in Unit 1 & 5 \\ \hline
\textbf{sat\_children} & Satellite's Children & Num. & 2 & No. of discourse units in Unit 2 & 8 \\ \hline
\textbf{genre} & Genre & Cat. & reddit & Genre of a document (where available) & 5 \\ \hline
\textbf{u1\_discontinuous} & Discontinuous & Cat. & \texttt{True} & Whether Unit 1’s tokens are not all contiguous in the text & 3 \\ \hline
\textbf{u2\_discontinuous} & Discontinuous & Cat. & \texttt{True} & Whether Unit 2’s tokens are not all contiguous in the text & 5 \\ \hline
\textbf{u1\_issent} & Is Sentence & Cat. & \texttt{True} & Whether Unit 1 is a whole sentence & 3 \\ \hline
\textbf{u2\_issent} & Is Sentence & Cat. & \texttt{True} & Whether Unit 2 is a whole sentence & 5 \\ \hline
\textbf{u1\_length} & Length & Num. & 9 & Length of Unit 1, in tokens & - \\ \hline
\textbf{u2\_length} & Length & Num. & 13 & Length of Unit 2, in tokens & - \\ \hline
\textbf{length\_ratio} & Length Ratio & Num. & 0.3 & Ratio of unit 1 and unit 2’s token lengths & 3 \\ \hline
\textbf{u1\_speaker} & Name of Speaker 1 & Cat. & Rainbow & Name of Speaker (available only for STAC) & - \\ \hline
\textbf{u2\_speaker} & Name of Speaker 2 & Cat. & Markus & Name of Speaker (available only for STAC) & - \\ \hline
\textbf{same\_speaker} & Same Speaker & Cat. & \texttt{True} & Whether the same speaker produced Unit 1 and Unit 2 & 2 \\ \hline
\textbf{u1\_func} & Unit Function & Cat. & root & Universal Dependencies Relation of Unit 1's Head to the Head of the input sequence & 1 \\ \hline
\textbf{u1\_pos} & Part of speech \& Morphological Tag & Cat. & VBN & Part of speech \& Morphological tag of the Unit 1's Head & - \\ \hline
\textbf{u1\_depdir} & Universal Part of speech Tag & Cat. & ROOT & Part of speech of the Unit 1's Head wrt. the Head of the input sequence & 8 \\ \hline
\textbf{u2\_func} & Unit Function & Cat. & advcl & Universal Dependencies Relation of Unit 2's Head to the Head of the input sequence & 8 \\ \hline
\textbf{u2\_pos} & Part of speech \& Morphological Tag & Cat. & VB & Part of speech \& Morphological tag of the Unit 2's Head & 8 \\ \hline 
\textbf{u2\_depdir} & Universal Part of speech Tag & Cat. & LEFT & Part of speech of the Unit 2's Head wrt. the Head of the input sequence & 7 \\ \hline
\textbf{doclen} & Document Length & Num. & 214 & Length of the document, in tokens & - \\ \hline
\textbf{u1\_position} & Position & Num. & 0.4 & Position of Unit 1 in the document, between 0.0 and 1.0 & 9 \\ \hline
\textbf{u2\_position} & Position & Num. & 0.4 & Position of Unit 2 in the document, between 0.0 and 1.0 & - \\ \hline
\textbf{percent\_distance} & Percent of distance & Num. & 0.05 & No. of discourse units between Unit 1 and Unit 2 divided by sequence length & - \\ \hline
\textbf{distance} & Distance & Num. & 7 & No. of other discourse units between Unit 1 and Unit 2 & 9 \\ \hline
\textbf{lex\_overlap\_words} & Lexical Overlap & Cat. & assets sold & List of overlapping non-stoplist words in Unit 1 and Unit 2 & - \\ \hline
\textbf{lex\_overlap\_length} & Lexical Overlap & Num. & 3 & No. of overlapping non-stoplist words in Unit 1 and Unit 2 & 1 \\ \hline
\textbf{unit1\_case} & Uppercased letter & Cat. & cap\_initial & Whether the unit starts with a capital letter or not & 1 \\ \hline \arrayrulecolor{black}
\textbf{unit2\_case} & Uppercased letter & Cat. & other & Whether the unit starts with a capital letter or not & 1 \\ \bottomrule
\end{tabular}
\caption{List of all features generated by the DisCoDisCo system, in the preprocessing stage, with descriptions. ``Type" refers to whether the feature is categorical or numerical. With ``No. Used'' we note how many corpus-specific DisCoDisCo models used said feature (out of 16 models in total).}
\label{tab:disco-features-full}
\end{table*}
