\documentclass{report}
\usepackage[spanish]{babel}
\usepackage[utf8]{inputenc}\newcounter{qcounter}
\begin{document}
\begin{center}
{\huge{\textbf{Borrador}}}
\end{center}
\begin{list}{\textbf{Artículo \arabic{qcounter}}:~}{\usecounter{qcounter}}
\item Definiciones:\\
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\item YYY\\
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\end{list}
\end{document}