\begin{frame} \frametitle{Relationship Sets} \movieexample \bigskip \pause \begin{block}{} A \emph{relationship} is an association among several entities.\\ \end{block} Formally, a relationship is a tuple $(e_1,e_2,\ldots,e_n)$ of entities. \medskip \begin{exampleblock}{} \begin{itemize} \item $(\text{Mark Hamill},\,\text{Star Wars})$ is a relationship \item $(\text{Harrison Ford},\,\text{Indiana Jones})$ is a relationship \end{itemize} \end{exampleblock} \vspace{10cm} \end{frame}