added one slide

presentations/English/LaTeX/PageRank.tex

@@ -1,3 +1,12 @@
+\subsection{How can we use this massive amout of information?}
+\begin{frame}{How can we use this massive amout of information?}
+    \begin{itemize}[<+->]
+        \item 625.3 million websites
+        \item Wikipedia is one website and has several millions of pages
+        \item[$\Rightarrow$] we need to rank websites!
+    \end{itemize}
+\end{frame}
+
 \subsection{Idea}
 \begin{frame}{Basics of PageRank}
     We all know that: