Integrate SPARQLWrapper

[ceteri]

Integrate SPARQLWrapper https://sparqlwrapper.readthedocs.io/en/stable/ along with the serialization methods, as a convenient means of consuming from a

Currently it's a bit clunky to use, which may required digging into its internals to intercept the RDF triples before they get serialized as JSON-LD.

Kudos to @igrangel

[ceteri]

It's probably a good idea to add a linked data fragments client along with this wrapperm, to help manage the trade-off between high server costs and high client costs.

For example:

• https://github.com/pchampin/hydra-py#id5