Add documentation

README.md

@@ -35,8 +35,8 @@ The following visualization is based on the distribution of 10 topics over a tot
 
 > **DARIAH Topics Explorer** allows you to analyze and explore your own text corpora using topic models – without prior knowledge or special prerequisites.
 
-# The example corpus
-An example corpus (10 British novels) is provided. If you use Git, you can clone the corpus, which is actually only a [submodule](https://git-scm.com/book/en/v2/Git-Tools-Submodules) in this repository, by writing:
+## The example corpus
+An example corpus (10 British novels) is provided in the folder `british-fiction-corpus` in the directory `data`. If you use Git, you can clone the corpus, which is actually only a [submodule](https://git-scm.com/book/en/v2/Git-Tools-Submodules) in this repository, by writing:
 
 ```
 $ git clone --recursive https://github.com/DARIAH-DE/TopicsExplorer.git