The Dutch parliamentary data created by PoliticalMashup is now also available in RDF format, and can be queried from a SPARQL endpoint.
The dataset is enriched with recognized named entities which are linked to DBpedia and Wikipedia.
More information can be found in the ParlBench paper and this description of a benchmark experiment.
The sparql endpoint only contains 1% of all data. If you want to query the data using sparql you must download it and load it in your own endpoint. Below is a short description how to do that.