Question: What is the date of death of Hsinbyumashin's mother?
Sentence (from "Hsinbyumashin"): Her full regnal title upon ascending the throne was Sīripavaratiloka Mahārājindādhipati Padumaratanādevī (သီရိပဝရတိလောက မဟာရာဇိန္ဒာဓိပတိ ပဒုမရတနာဒေဝီ).
Relevant evidence: No