- The suffix .pickle is not in use anymore.
The module Wikibase is a small module for extracting the signature from items at Wikidata. It is available at Module:Wikibase, and two slightly different test sets are provided. One is Module:Wikibase/simple.pickle which is as simple as possible, and the other is Module:Wikibase/advanced.pickle which is somewhat more involved.
The first one use an implicit subject, while the second use an explicit subject.
Testdata at Module:Wikibase/advanced.data.