It is a bit hard to understand what examples in the specs try to do (especially for new comers).
Little suggestion to add more easy-to-understand explanation of examples. For instance, Example7 could be described as follows:
give up to 5 entities with a name similar to "Christel Hanewinckel", of type "DifferentiatedPerson" and whose "professionOrOccupation" matches either the string "Politik*" or the entity with id "wissenschaftler".
Optionally, it would also be helpful to add what kind of results (response syntax) would be expected.