I don't see difficulties if is made sure, that two additional fields belong to every information in Wikidata: a license field and a citation field, with the regulation, that one of these must be filled, otherwise Wikidata does not accept this edit.
Which of the both additional fields is filled, lies in the responsibility of the editor.
In addition it must be provided, that it is impossible to take over any info without such - filled - additional field into any Wikipedia.
dr.cueppers de:WP
Dr. Cüppers GmbH Hübnerstraße 2 33104 Paderborn 05254 935700