Gray Cowan Boyce (19 February 1899 - 14 May 1981) was an American medieval historian and historical bibliographer whose masterwork was his five volume "Literature of Medieval History, 1930-1975: A Supplement to Louis John Paetow's "A Guide to the Study of Medieval History"" (1981).
Gray Cowan Boyce was a young man when he died. 
My statement is definitely incorrect because he was 82 when he died, which is not young by any human standards. I think it was difficult for the model to understand because maybe it doesn't know what "young' is in terms of humans. 