diff --git a/filter-lists/edit-filter-managers-requests b/filter-lists/edit-filter-managers-requests
new file mode 100644
index 0000000000000000000000000000000000000000..3f6a141413205dadfee84618d666626be27d8235
--- /dev/null
+++ b/filter-lists/edit-filter-managers-requests
@@ -0,0 +1,49 @@
+Comment: since the introduction of Edit Filter Helper, 11 EFH requests have been approved. Of them, only 1 user (if I haven't overlooked anything) has been since promoted (also after a formal request) to Edit filter manager.
+
+Dec 2018 - June 2019
+https://en.wikipedia.org/w/index.php?title=Wikipedia:Edit_filter_noticeboard/Archive_5&oldid=904735737
+
+Requests for Edit Filter Helper
+2 approved
+1 approved for a period of 1 year
+4 denied
+1 withdrawn
+
+Requests for Edit Filter Manager
+1 approved (had Edit Filter Helper already)
+
+
+Jan 2018 - Dec 2018
+https://en.wikipedia.org/wiki/Wikipedia:Edit_filter_noticeboard/Archive_4
+
+Requests for Edit Filter Helper
+2 abandoned? (since users noted they were able to do what they wanted to anyway)
+1 request for degrading (from Edit Filter Manager to Edit filter Helper)
+4 approved
+3 denied
+
+Requests for Edit Filter Manager
+1 approved for a period of 10 days (person was working on a bug)
+
+
+Sep 2017 - Jan 2018
+https://en.wikipedia.org/wiki/Wikipedia:Edit_filter_noticeboard/Archive_3
+
+Note in Sep 2017 Edit Filter Helper right was introduced
+
+Requests for Edit Filter Helper
+5 approved
+1 withdrawn
+1 denied
+
+Requests for Edit Filter Manager
+1 denied
+
+
+Nov 2016 - Sep 2017
+https://en.wikipedia.org/wiki/Wikipedia:Edit_filter_noticeboard/Archive_2
+
+Only Edit Filter Manager exists as a group
+
+Requests for Edit Filter Manager
+3 approved
diff --git a/src/explore.ipynb b/src/explore.ipynb
index 5c646334b745f38c0d59381cae03c785467466bf..ddc5295bdd38bcd72f9be98ef3ffb9066ab6cc5e 100644
--- a/src/explore.ipynb
+++ b/src/explore.ipynb
@@ -1,5 +1,19 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Explorative analysis of EN Wikipedia's edit filters"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "This notebook contains scripts for the analysis and visualisation of some characteristics of the [edit filters](https://en.wikipedia.org/wiki/Wikipedia:Edit_filter) of the English Wikipedia."
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,
@@ -11754,6 +11768,13 @@
     "## Edit filter editors"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "The following snippet determines the edit filter managers who were the last to modify a filter. It also computes how many filters have each manager modified (as last modifier)."
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 89,
diff --git a/thesis/5-Overview-EN-Wiki.tex b/thesis/5-Overview-EN-Wiki.tex
index ceeca9ddf76d5abec8ab41f7fc4b875ea9de8f5f..ab5ed31eebe10819e682c98b731f18ac5170263f 100644
--- a/thesis/5-Overview-EN-Wiki.tex
+++ b/thesis/5-Overview-EN-Wiki.tex
@@ -121,23 +121,27 @@ Most public filters on the other hand still assume good faith from the editors a
 
 \subsection{Filter makers}
 
-%TODO how many different edit filter editors are there (af\_user)?
-* How stable is the filter maker community?
-  ** how many new users have become part of it over time?
-  ** Has it been the same people from the very beginning?
-  ** are there a couple of very active edit filter managers, that are also (informal) leaders?
-  ** Do edit filter managers specialize on particular types of filters (e.g. vandalism vs good faith?)
-
-Quite some of the 154 edit filter managers have a kind of "not active at the moment" banner on their user page.
+Here, a few characteristics of the edit filter managers group are discussed.
+As mentioned in section~\ref{}, EN Wikipedia has 154 edit filter managers as of (date).
+The group is as discussed (syn!) quite small.
+(However, for comparison there are only 4 users in the edit filter managers group on the Catalan Wikipedia and the role does not exist at all on the German, Spanish and Russian ones which leads to the assumption that for these languages all administrators have the \emph{abusefilter\_modify} permission.)
+
+The edit filter managers group is quite stable, with only 4 users who have become an edit filter manager since November 2016 (according to the discusssion archives of the edit filter noticeboard where the permission is requested).
+Since the edit filter helper group has been created in September 2017, only 11 users have been granted the corresponding permissions and only one of them has been subsequently ``promoted'' to become an edit filter manager.
+(Interestingly, currently (July 2019) there are 19 people in the edit filter helpers group, so apparently some of them have received the right although no records are there on the noticeboard??)
+
+Moreover, quite some of the 154 edit filter managers on English Wikipedia have a kind of ``not active at the moment'' banner on their user page.
 How many new editors have gotten the permission in recent time?
 Otherwise the group is apparently aging..
 
+% Stable? How many new users have become part of it over time?
+% Has it been the same people from the very beginning?
+
+% What type of work do the different managers take over?
+There are a couple of very active managers who seem to keep an overview over all filters and do maintenance work on them e.g. updating conditions to optimise evaluation or updating (syn!) deprecated variable names upon updates (syn!) of the extension's code.
 
-CAT: https://ca.wikipedia.org/wiki/Especial:Usuaris/abusefilter (currently: 4 users)
+%TODO Do edit filter managers specialize on particular types of filters (e.g. vandalism vs good faith?)
 
--- auf Spanisch/Deutsch/Russisch existiert die Rolle nicht; interessant zu wissen, ob sie iwo subsumiert wurde
--- auf Bulgarisch übrigens auch nicht, aber da existiert auch die gesamte EditFilter seite nicht
-Probably it's simply admins who can modify the filters there.
 
 
 \subsection{Filter activity}
diff --git a/thesis/6-Discussion.tex b/thesis/6-Discussion.tex
index bfc4e5d79d7e66b736ba3ea640b29db5cdc69e54..63bb7f6bfa9e8e5a9c5b1057f0d44f6c1a8eb857 100644
--- a/thesis/6-Discussion.tex
+++ b/thesis/6-Discussion.tex
@@ -189,3 +189,5 @@ also
 \end{comment}
 
 %\subsection{Harassment and bullying}
+
+%TODO Do edit filter managers specialize on particular types of filters (e.g. vandalism vs good faith?) -- abuse\_filter\_history table is needed for this