Question: When is Rúhíyyih Khánum's husband's birthday?
Sentence (from "Rúhíyyih Khánum"): After his death, Rúhíyyih Rabbání became for Baháʼís the last remaining link to the family of ʻAbdu'l-Bahá, who headed the Baháʼí Faith from 1892 to 1921 and was the eldest son of the faith's founder, Baháʼu'lláh.
Relevant evidence: No