--- a/handouts/ho05.tex	Thu Nov 07 00:07:16 2019 +0000
+++ b/handouts/ho05.tex	Thu Nov 14 01:21:02 2019 +0000
@@ -71,7 +71,12 @@
 
 \noindent
 from natural languages were the meaning of \emph{flies} depends on the
-surrounding \emph{context} are avoided as much as possible.
+surrounding \emph{context} are avoided as much as possible. Here is
+an interesting video about C++ being not a context-free language
+
+\begin{center}
+\url{https://www.youtube.com/watch?v=OzK8pUu4UfM}
+\end{center}  
 
 Context-free languages are usually specified by grammars. For example
 a grammar for well-parenthesised expressions can be given as follows: