Question: What is the date of birth of Bhanurangsi Savangwongse's mother?
Sentence (from "Bhanurangsi Savangwongse"): Bhanurangsi Savangwongse, the Prince Bhanubandhu Vongsevoradej (11 January 1859 – 13 June 1928)  was a son of HM King Mongkut of Siam and HM Queen Debsirindra.
Relevant evidence: Yes