--- a/slides/slides01.tex	Fri Sep 25 08:51:12 2015 +0100
+++ b/slides/slides01.tex	Fri Sep 25 17:39:02 2015 +0100
@@ -245,7 +245,7 @@
 
 transforming strings into structured data\\[10mm]
 
-\alert<2>{\LARGE\bf Lexing} \onslide<2>{\hfill{}baseed on regular expressions}\medskip\\
+\alert<2>{\LARGE\bf Lexing} \onslide<2>{\hfill{}based on regular expressions}\medskip\\
 \hspace{5mm}(recognising ``words'')\\[6mm]
 
 {\LARGE\bf Parsing}\medskip\\