If a file uses a creator template the artist value of the API result is unusable.
Suggestion: Return the artist name only
Version: unspecified
Severity: normal
URL: https://commons.wikimedia.org/w/api.php?action=query&titles=File:Demo_stollwerck_wirdeier_1980-05-20x38.jpg&prop=imageinfo&iiprop=extmetadata&format=jsonfm