-- semActor extraction has been revised:
1. group entities by URI
2. take coreference sets as a start (like events) and select the entity group with most overlap
3. create semObjects for corefset with entities and ignore corefsets without entity matching
4. create semObjects for all remaining entities

-- create newsreader URI for entities: <http://www.newsreader-project.eu/data/cars/entities/Quantum_Interferometry_Company>
This will lead to cross document coreference for these entities

-- Fixed a bug in the function that adds a semObject to a result list of semObject. Some entities were lost that now get found.
-- There is filtering of external references coming from the SRL reranking and the entity-type reranker