diff --git a/thesis/2-Background.tex b/thesis/2-Background.tex
index aa8f3358dcd4593f0cc95e990e415f953eeb4259..a17f5e3252ebbcbb8a932dd4dbcb99df3bc4565f 100644
--- a/thesis/2-Background.tex
+++ b/thesis/2-Background.tex
@@ -4,10 +4,14 @@
 The present work can be embedded in the context of (algorithmic) quality-control mechanisms on Wikipedia.
 There is a whole ecosystem (syn?) of actors struggling to maintain the anyone-can-edit encyclopedia as good^^ and vandalism free as possible.
 We want to be able to better understand the role of edit filters in the vandal fighting network of humans, bots, semi-automated tools, and the machine learning framework ORES.
-To this end, in the current chapter we investigate vandalism and vandalism fighting guidelines, as well as the mechanisms mentioned above.
+After all, edit filters were introduced to Wikipedia quite late, compared to the remaining mechanisms: in 2009. %TODO: when was the other stuff introduced
+To this end, in the current chapter we study scientific literature on vandalism in Wikipedia and the quality control mechanisms mentioned above.
 
 \section{Vandalism on Wikipedia}
+%TODO put here papers on vandalism
 
+\begin{comment}
+\subsection{Vandalism: Original Research}
 According to Wikipedia's newspaper, the Signpost, edit filters were initially introduced as a vandalism prevention mechanism~\cite{Signpost2009}.
 The aim of this section is to provide a better understanding of vandalism on Wikipedia: What is vandalism, and what not; who engages in vandalism; who is striving to prevent it and with what means?
 
@@ -83,6 +87,7 @@ And there are also users who specifically dedicate substantial amount of their W
 
 These dedicated vandal fighters mostly do so with the aid of some (semi or fully) automated tools which not only significantly speeds up the process (see below),
 but, according to research, fundamentally changes the nature of the encyclopedia and its collaboration ecosystem~\cite{GeiRib2010}.
+\end{comment}
 
 \section{Quality-control mechanisms on Wikipedia}
 
diff --git a/todo b/todo
index 34187a5b04479b348bccdd6ba5db50ae14a4baa2..a83b88a12f7bab5a6c9075a29f6e71d703b6bfdb 100644
--- a/todo
+++ b/todo
@@ -43,6 +43,7 @@ https://en.wikipedia.org/wiki/Wikipedia:Blocking_IP_addresses
 https://en.wikipedia.org/wiki/Wikipedia:Long_term_abuse
 https://en.wikipedia.org/wiki/Wikipedia:Sockpuppet_investigations
 
+https://en.wikipedia.org/wiki/Category:Wikipedia_counter-vandalism_tools
 https://en.wikipedia.org/wiki/Wikipedia:Counter-Vandalism_Unit
 https://en.wikipedia.org/wiki/Wikipedia:Counter-Vandalism_Unit/Academy
 https://en.wikipedia.org/wiki/Wikipedia:Cleaning_up_vandalism