Extract Wikidata claim values from target textual fields

[marfox]

To be implemented as a feature.

This is best explained through an example:

• Wikidata: Wolfgang Zerer
  • date of birth = 1961
  • place of birth = Passau
  • occupation = harpsichordist
• Discogs: Wolfgang Zerer
  • description = Classical organist and harpsichordist, born 1961 in Passau
• feature score = 3

[marfox]

Note that this feature only works when the target has textual data