more grammar, more structure

docs/advanced.rst

@@ -250,10 +250,13 @@ For a detailed tutorial on queries it is referred to the MongoDB query tutorial
 
 https://docs.mongodb.com/manual/tutorial/query-documents/
 
-The queries used here are pymongo query, i.e. have Python syntax, and are
-serialized to YAML and to JSON:
+In the examples provided in this tutorial the queries are serialized to YAML and
+to JSON.
 
 
+Final remark
+------------
+
 Not every feature of FireWorks is covered in this tutorial. Please visit the
 the documentation website https://materialsproject.github.io/fireworks/ for
 detailed tutorials and comprehensive documentation.