When you create some SPARQL Queries you have to know the vocabularies.
A good source of information is:
- https://jazz.net/ns/
- https://<clsmserver>:9443/lqe/web/admin/vocabularies
- http://open-services.net/wiki/core/Vocabulary-index/
- or the big, bit picture http://lov.okfn.org/dataset/lov/
Steve Blog 