Question: What is the date of death of Beatrice Welles's mother?
Sentence (from "Paola Mori"): Paola di Gerfalco, Contessa di Gerfalco (18 September 1928 – 12 August 1986), better known by her professional name Paola Mori, was an Italian actress and aristocrat, and the third and last wife of Orson Welles.
Relevant evidence: Yes