docs(examples): improve and correct examples section

docs/examples.rst

 Examples
 ========
 
-Proof-of-Concept examples
--------------------------
-
 For certain proof of concepts, we provide Jupyter notebooks, which require
-additional dependencies to be installed. This can be achieved by appending
-:code:`[examples]` to the install command, e.g.
-
-.. code-block:: shell
-
-    pip install .[examples]
-
-Afterwards you can browser through the following list:
+additional dependencies to be installed. This is described in our
+`INSTALL guide <https://zema-emc-annotated.readthedocs.io/en/latest/INSTALL.html#optional-jupyter-notebook-dependencies>`_
+After executing the necessary command, you can browser through the following list but
+more importantly, check out the core class
+`ZeMASamples <https://zema-emc-annotated.readthedocs.io/en/latest/zema_emc_annotated.dataset.html#zema_emc_annotated.dataset.ZeMASamples to get the samples in>`_.
 
 .. toctree::
    :maxdepth: 1
+   :caption: Jupyter Notebook with code to access the dataset:
 
    examples/read_dataset