Updated demo description

Author: Aklakan

docs/graphql/demo.md

@@ -8,7 +8,7 @@ layout: default
 The following demonstrators showcase the use of GraphQL to query and present data from a SPARQL enpdoint.
 Inspect the source code to see the underlying queries.
 
-* [GraphQL-to-GeoJSON Demo.](https://smartdataanalytics.github.io/RdfProcessingToolkit/demos/leaflet-graphql/)
-* [WikiData Movies Browser.](https://smartdataanalytics.github.io/RdfProcessingToolkit/demos/movies/)
+* A simple [WikiData Movies Browser.](https://smartdataanalytics.github.io/RdfProcessingToolkit/demos/movies/). This is a HTML one-pager that queries the GraphQL endpoint of a demo RPT instance loaded with movies from Wikidata.
 
+* A simple [GraphQL-to-GeoJSON Demo.](https://smartdataanalytics.github.io/RdfProcessingToolkit/demos/leaflet-graphql/). This is a HTML one-pager that uses GraphQL to transform GeoSPARQL data to a customizable GeoJSON structure.