\begin{figure*}[htb]
  \centering
  \begin{subfigure}{0.32\textwidth}
    \includegraphics[width=\linewidth]{assets/bribri-copy-strategies.pdf}
    \caption{Bribri}
  \end{subfigure}
  \hfill
  \begin{subfigure}{0.32\textwidth}
    \includegraphics[width=\linewidth]{assets/guarani-copy-strategies.pdf}
    \caption{Guaran\'{i}}
  \end{subfigure}
  \hfill
  \begin{subfigure}{0.32\textwidth}
    \includegraphics[width=\linewidth]{assets/maya-copy-strategies.pdf}
    \caption{Maya}
  \end{subfigure}
  \caption{chrF results for strategies incorporating sentence copying using various sources. $\textsc{Copy}_{tr}$ uses only the training data. $\textsc{Copy}_{all}$ uses training data and source sentences from the evaluation data. $\textsc{Copy}_{ext}$ uses sentences from external corpora.}
  \label{fig:copy-strategies}
\end{figure*}