Q: Information: - Ace is a fictional character from the G.I. Joe : A Real American Hero toyline , comic books and cartoon series . He is the G.I. Joe Team 's original fighter pilot and debuted in 1983 . - A fighter aircraft is a military aircraft designed primarily for air-to-air combat against other aircraft, as opposed to bombers and attack aircraft, whose main mission is to attack ground targets. The hallmarks of a fighter are its speed, maneuverability, and small size relative to other combat aircraft. - A dogfight, or dog fight, is an aerial battle between fighter aircraft, conducted at close range. Dogfighting first appeared during World WarI, shortly after the invention of the airplane. Until at least 1992, it was a component in every major war, despite beliefs after World WarII that increasingly greater speeds and longer range weapons would make dogfighting obsolete. Modern terminology for air-to-air combat is air combat maneuvering (ACM), which refers to tactical situations requiring the use of individual basic fighter maneuvers (BFM) to attack or evade one or more opponents. This differs from aerial warfare, which deals with the strategy involved in planning and executing various missions. - A fighter pilot is a military aviator trained to engage in air-to-air combat while in the cockpit of a fighter aircraft. Fighter pilots undergo specialized training in aerial warfare and dogfighting (close range aerial combat). A fighter pilot with at least five air-to-air kills becomes known as an ace. - Aerial warfare is the use of military aircraft and other flying machines in warfare. Aerial warfare includes bombers attacking enemy concentrations or strategic targets; fighter aircraft battling for control of airspace; attack aircraft engaging in close air support against ground targets; naval aviation flying against sea and nearby land targets; gliders, helicopters and other aircraft to carry airborne forces such as paratroopers; aerial refueling tankers to extend operation time or range; and military transport aircraft to move cargo and personnel. Historically, military aircraft have included lighter-than-air balloons carrying artillery observers; lighter-than-air airships for bombing cities; various sorts of reconnaissance, surveillance and early warning aircraft carrying observers, cameras and radar equipment; torpedo bombers to attack enemy shipping; and military air-sea rescue aircraft for saving downed airmen. Modern aerial warfare includes missiles and unmanned aerial vehicles. Surface forces are likely to respond to enemy air activity with anti-aircraft warfare. Given the paragraphs above, decide what entity has the relation 'occupation' with 'aviator'.
A: ace

Question: Information: - A historian is a person who researches, studies, and writes about the past, and is regarded as an authority on it. Historians are concerned with the continuous, methodical narrative and research of past events as relating to the human race; as well as the study of all history in time. If the individual is concerned with events preceding written history, the individual is a historian of prehistory. Although "historian" can be used to describe amateur and professional historians alike, it is reserved more recently for those who have acquired graduate degrees in the discipline. Some historians, though, are recognized by publications or training and experience. "Historian" became a professional occupation in the late nineteenth century as research universities were emerging in Germany and elsewhere. - Anna Komnene ("Anna Komnn"; 1 December 1083 1153), commonly Latinized as Anna Comnena, was a Byzantine princess, scholar, physician, hospital administrator, and historian. She was the daughter of the Byzantine Emperor Alexios I and his wife Irene Doukaina. She wrote the "Alexiad", an account of her fathers reign, which is unique in that it was written by a princess about her father. - The Battle of Manzikert was fought between the Byzantine Empire and the Seljuq Turks on August 26, 1071 near Manzikert (modern Malazgirt in Mu Province, Turkey). The decisive defeat of the Byzantine army and the capture of the Emperor Romanos IV Diogenes played an important role in undermining Byzantine authority in Anatolia and Armenia, and allowed for the gradual Turkification of Anatolia. - JohnII Komnenos or Comnenus ("IannsII Komnnos"; September 13, 1087 8 April 1143) was Byzantine Emperor from 1118 to 1143. Also known as "John the Beautiful" or "John the Good" ("Kaloianns"), he was the eldest son of Emperor AlexiosI Komnenos and Irene Doukaina and the second emperor to rule during the Komnenian restoration of the Byzantine Empire. John was a pious and dedicated monarch who was determined to undo the damage his empire had suffered following the battle of Manzikert, half a century earlier. - Irene Doukaina or Ducaena ( Greek : , Eirn Doukaina ) ( c. 1066 -- 19 February 1138 ) was the wife of the Byzantine emperor Alexios I Komnenos , and the mother of the emperor John II Komnenos and of the historian Anna Komnene . - A physician, medical practitioner, medical doctor or simply doctor is a professional who practises medicine, which is concerned with promoting, maintaining, or restoring health through the study, diagnosis, and treatment of disease, injury, and other physical and mental impairments. Physicians may focus their practice on certain disease categories, types of patients and methods of treatmentknown as specialitiesor they may assume responsibility for the provision of continuing and comprehensive medical care to individuals, families, and communitiesknown as general practice. Medical practice properly requires both a detailed knowledge of the academic disciplines (such as anatomy and physiology) underlying diseases and their treatmentthe "science" of medicineand also a decent competence in its applied practicethe art or "craft" of medicine. Given the paragraphs above, decide what entity has the relation 'country of citizenship' with 'byzantine empire'.
Answer:
irene doukaina