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"): Alexios, however, was worried about Theodore's reaction, so he kept Gregory at the court as a hostage in order to ensure Theodore's continued good behavior, reassuring Theodore with the claim that he was contemplating marrying Gregory to one of his own daughters.
Relevant evidence: No