diff --git a/README.md b/README.md
index 0d8622c..6a93026 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ Generate a map for https://www.ccc.de/regional from Wikidata, Nominatim and the
 ```
 pip3 install -r requirements.txt
 export DOKU_CCC_DE_BASICAUTH=username:password
-./generate_map.py --update-erfalist
+./generate_map.py --rename 'Frankfurt am Main' 'Frankfurt' --update-erfalist
 ls -al out/
 ```
 
@@ -58,7 +58,7 @@ A run without cache takes some time as it fetches all data from their sources:
 1. Get a list of Erfas & Chaostreffs from the doku.ccc.de Semantic Mediawiki API.
 1. Resolve all POIs' (Erfas & Chaostreffs) street addresses' to geocoordinates using [Nominatim](https://nominatim.org/).
 
-**Use the cache at least for the country and state borders.  Otherwise, Wikidata will start rate limiting pretty quickly.** 
+**Use the cache whenevery you don't need to update country borders or hackerspace locations.  Otherwise, both Wikidata and Nominatim will start rate limiting pretty quickly.** (And caching is actually required by [Nominatim's acceptable use policy](https://operations.osmfoundation.org/policies/nominatim/)).
 
 ## License