Question: Information: - Gregory Tarchaneiotes was a "protospatharius" and the long-reigning catepan of Italy from 998 to 1006. In December 999, and again on February 2, 1002, he reinstituted and confirmed the possessions of the abbey and monks of Monte Cassino in Ascoli. In 1004, he fortified and expanded the castle of Dragonara on the Fortore. He gave it three circular towers and one square one. He also strengthened Lucera. - Prtospatharios was one of the highest court dignities of the middle Byzantine period (8th to 12th centuries), awarded to senior generals and provincial governors, as well as to foreign princes. - Alexios Xiphias ( Greek : , Italian : Alessio Xifea ) was a Byzantine protospatharios and catepan of Italy from 1006 to 1008 , following the long term of office of Gregory Tarchaneiotes . In March 1007 , he promulgated a diploma in favour of Alexander , abbot of S. Giovanni in Lamis . - The spatharii or spatharioi (singular: literally "spatha-bearer") were a class of Late Roman imperial bodyguards in the court in Constantinople in the 5th6th centuries, later becoming a purely honorary dignity in the Byzantine Empire. - The Fortore (Latin: "Fertor" or "Frento") is a river which flows through the provinces of Benevento, Campobasso and Foggia in southern Italy. It is long. - Monte Cassino (sometimes written Montecassino) is a rocky hill about southeast of Rome, Italy, to the west of the town of Cassino and altitude. Site of the Roman town of Casinum, it is best known for its historic abbey. St. Benedict of Nursia established his first monastery, the source of the Benedictine Order, here around 529. Given the information above, choose from the list below the object entity that exhibits the relation 'country of citizenship' with the subject 'alexios xiphias'. Choices: - byzantine empire - italy
Answer:
byzantine empire