I think help with query building is at least as important as serialization of results. If you can't work out how to find anything, there will be no results to serialize. :-) Every SPARQL end-point exposes differently-structured RDF, so the first job a newcomer has is to try to work out what classes and properties are in there, and how they relate to each other.As this is just starting the SPARQL story, it would be nice to see suggestions about how we could format the output better... Maybe some export options in the GUI. JSON has all the data, but some processing is required to get CONSTRUCT produce some useful RDF serialization. At least for now.