\documentclass[11pt,a4paper]{article}
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\begin{document}

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\textbf{Title of the talk}

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Author 1 (name surname), affiliation

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emailauthor1@nonpar.stats.pt

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Author 2 (name surname), affiliation

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emailauthor1@nonpar.probab.pt

\bigskip

\noindent
\textbf{Abstract}: The text of your abstract goes here. Remember that it should be less than one page long. Besides this restriction, it may contain whatever \LaTeX\ commands you like. Please be careful if you use personal macros.



\end{document} 