diff --git a/text/preliminaries/data.tex b/text/preliminaries/data.tex
index af16337..dfb8cee 100644
--- a/text/preliminaries/data.tex
+++ b/text/preliminaries/data.tex
@@ -1,7 +1,6 @@
 \section{Types of data sets}
 \label{sec:data}
 
-
 \subsection{Data categories}
 \label{subsec:data-categories}