Question: What is the date of death of Mariam, Daughter Of Bagrat Iv Of Georgia's father?
Sentence (from "Mariam, daughter of Bagrat IV of Georgia"): Professor Cyril Toumanoff, a student of the medieval Caucasian genealogies, identifies Mariam with the anonymous "Alan" woman of "very good birth" known from Anna Komnene's "Alexiad" to have married, as his second wife, the Byzantine nobleman Theodore Gabras, "dux" of Trebizond in 1091.
Relevant evidence: No