I'm going to ask this by example. Take a look at this media file's page
It has a table showing "Author" with a value of "Speaker: The Voice of Hassocks Authors of the article". (I'm only interested in the "The Voice of Hassocks" part but the whole thing would be fine).
Is that author value accessible via the API? Generally speaking I can see how I can get other file info via, e.g.
But looking through the output of that API request, I don't see "The Voice of Hassocks" appearing anywhere. Nor, looking through the API docs, do I see anything else other than metadata and extmetadata that might contain it. Is that "Author" info exposed via the API anywhere?