Swap buyerName and Description in media register

[mariana-angelova]

Important: Check if there are not correctly swapped already!

Second part of the task

• legalName and rdfs:label of the target company (eg http://edu.ontotext.com/media-register/resource/company/8b9d8c6ecba4bf919ed55c71c4de94cc) are also wrong

  This is harder to fix: should be fixed together with the above

Example SPARQL query:

delete {
  ?contract :buyerName ?x; :description ?y
} insert {
  ?contract :buyerName ?y; :description ?x
} where {
  ?contract a :Contract; :buyerName ?x; :description ?y
}