question: Who is the paternal grandmother of Zoë Porphyrogenita?
context: [["Kaoru Hatoyama", ["After the elections of 2009, she became more widely known as the grandmother of Prime Minister Yukio Hatoyama and his politician brother Kunio Hatoyama."]], ["Mona Hopton Bell", ["Mona Hopton Bell( 1867- 1940) was a British artist, best known for her portraits of civic figures.", "She was the grandmother of the painter Jean H. Bell."]], ["Anne Denman", ["Anne Denman( 1587\u20131661) was born in Olde Hall, Retford, Nottinghamshire.", "Through a fortunate second marriage with Thomas Aylesbury, she became the grandmother of Lady Anne Hyde, Duchess of York and great- grandmother of Queen Mary II and Queen Anne."]], ["Hannah Arnold", ["Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children."]], ["Tjuyu", ["Tjuyu( sometimes transliterated as Thuya or Thuyu) was an Egyptian noblewoman and the mother of queen Tiye, and the wife of Yuya.", "She is the grandmother of Akhenaten, and great grandmother of Tutankhamun."]], ["H\u00fcma Hatun", ["H\u00fcma Hatun (1410 \u2012 September 1449) was the fourth wife of Ottoman Sultan Murad II and mother of Mehmed II and the grandmother of Bayezid II."]], ["Zo\u00eb Porphyrogenita", ["Zo\u00eb Porphyrogenita (\"life\" ; 978 \u2013 11 June 1050) reigned as Byzantine Empress from 11 November 1028 until her death in 1050.", "She ruled alongside her three husbands, her adopted son Michael V, and her sister Theodora.", "Zo\u00eb held actual power with Theodora for only two months between April and June 1042.", "Zo\u00eb was born to Constantine VIII, who was nominal co-emperor to his brother Basil II.", "Basil died when Zo\u00eb was 47, leaving the Byzantine throne entirely to her father.", "As he had no sons, Constantine hoped to continue the dynasty by marrying off one of his daughters.", "Zo\u00eb, aged 50, was married to Romanos Argyros.", "Zo\u00eb and her husband took the throne three days later on her father's death.", "The marriage was troubled and after five years Romanos III was found dead in his bath.", "His death has been variously attributed to Zo\u00eb, her young lover Michael, or both.", "They were married on the same day as the murder, and he was crowned emperor on the following day.", "Seven years later, Zo\u00eb was persuaded to adopt her dying husband's nephew, also named Michael.", "Once Michael V became emperor, he promptly exiled Zo\u00eb.", "This action sparked a popular revolt which dethroned him and installed Zo\u00eb and Theodora as joint empresses.", "After a two-month joint reign Zo\u00eb married a former lover who was installed as Constantine IX Monomachos, transferring power to him.", "Eight years later, Zo\u00eb died aged 72."]], ["Hubba bint Hulail", ["Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic\" Nab\u012b\"( Prophet) Muhammad ibn Abdullah."]], ["G\u00fclbahar Hatun (wife of Mehmed II)", ["G\u00fclbahar Hatun( 1432 \u2013 1492) was the consort of Sultan Mehmed II, and mother of Sultan Bayezid II of the Ottoman Empire and the grandmother of Selim I."]], ["Constantine VIII", ["Constantine VIII (\"K\u014dnstantinos VIII\") (960 \u2013 11 November 1028) was the Byzantine Emperor from 15 December 1025 until his death in 1028.", "He was the younger son of Emperor Romanos II and Empress Theophano.", "He was nominal co-emperor for 63 years from 962, successively with his father; stepfather, Nikephoros II; uncle (by marriage), John I; and brother, Basil II.", "Basil II died childless in 1025 and thus left the rule of the Byzantine Empire in Constantine's hands.", "Constantine had no interest in politics, statecraft or the military.", "His brief reign is said to have been \"an unmitigated disaster\", sparking \"a collapse of the military power of the Empire\".", "Constantine had no sons, so shortly before his death he married his daughter Zo\u00eb to his chosen successor Romanos Argyros."]]]
supporting_facts: [["Zo\u00eb Porphyrogenita", 3], ["Constantine VIII", 1]]
evidences: [["Zo\u00eb Porphyrogenita", "father", "Constantine VIII"], ["Constantine VIII", "mother", "Theophano"]]
answer: Theophano