Please answer the following question: Information: - Human geography is the branch of the social sciences that deals with the study of people and their communities, cultures, economies and interaction with the environment by noticing their relations with and across space and place. As an intellectual discipline, geography is divided into the sub-fields of physical geography and human geography, the latter concentrating upon the study of human activities, by the application of qualitative and quantitative research methods. - Emeritus, in its current usage, is an adjective used to designate a retired professor, pastor, bishop, pope, president, prime minister, or other person. - Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe. - Kingston upon Hull, usually abbreviated to Hull, is a city and unitary authority in the East Riding of Yorkshire, England. It lies upon the River Hull at its junction with the Humber estuary, 25miles (40km) inland from the North Sea, with a population of. - Modern humans ("Homo sapiens", primarily ssp. "Homo sapiens sapiens") are the only extant members of Hominina tribe (or human tribe), a branch of the tribe Hominini belonging to the family of great apes. They are characterized by erect posture and bipedal locomotion; manual dexterity and increased tool use, compared to other animals; and a general trend toward larger, more complex brains and societies. - Professor (commonly abbreviated as "prof.") is an academic rank at universities and other post-secondary education and research institutions in most countries. Literally, "professor" derives from Latin as a "person who professes" being usually an expert in arts or sciences, a teacher of the highest rank. - Earth science or geoscience is a widely embraced term for the fields of science related to the planet Earth. Earth science can be considered to be a branch of planetary science, but with a much older history. There are both reductionist and holistic approaches to Earth sciences. The Earth sciences can include the study of geology, the lithosphere, and the large-scale structure of the Earth's interior, as well as the atmosphere, hydrosphere, and biosphere. Typically, Earth scientists use tools from geography, chronology, physics, chemistry, biology, and mathematics to build a quantitative understanding of how the Earth system works and evolves. - Physical geography (also known as geosystems or physiography) is one of the two major sub-fields of geography. Physical geography is that branch of natural science which deals with the study of processes and patterns in the natural environment like the atmosphere, hydrosphere, biosphere, and geosphere, as opposed to the cultural or built environment, the domain of human geography. - Area studies are interdisciplinary fields of research and scholarship pertaining to particular geographical, national/federal, or cultural regions. The term exists primarily as a general description for what are, in the practice of scholarship, many heterogeneous fields of research, encompassing both the social sciences and the humanities. Typical area study programs involve history, political science, sociology, cultural studies, languages, geography, literature, and related disciplines. In contrast to cultural studies, area studies often include diaspora and emigration from the area. - Hull University Union (HUU) is the students' union for the University of Hull in Kingston upon Hull, England. It is run as a completely separate entity to the university itself. There is a Union Executive Committee (UEC) chaired by the President, Matt Evans, which consists of six full-time sabbatical officers, and the Chief Executive as an advisor to the Sabbatical Officers. - A president is the leader of a country or a division or part of a country, typically a republic, a democracy, or a dictatorship. The title "president" is sometimes used by extension for leaders of other groups, including corporate entities and social groups. - Art is a diverse range of human activities in creating visual, auditory or performing artifacts (artworks), expressing the author's imaginative or technical skill, intended to be appreciated for their beauty or emotional power. In their most general form these activities include the production of works of art, the criticism of art, the study of the history of art, and the aesthetic dissemination of art. - A prime minister is the most senior minister of cabinet in the executive branch of government, often in a parliamentary or semi-presidential system. In many systems, the prime minister selects and may dismiss other members of the cabinet, and allocates posts to members within the government. In most systems, the prime minister is the presiding member and chairman of the cabinet. In a minority of systems, notably in semi-presidential systems of government, a prime minister is the official who is appointed to manage the civil service and execute the directives of the head of state. In parliamentary systems fashioned after the Westminster system, the prime minister is the presiding and actual head of government and head of the executive branch. In such systems, the head of state or the head of state's official representative (i.e. the monarch, president, or governor-general) usually holds a largely ceremonial position, although often with reserve powers. - Eratosthenes of Cyrene (; ) was a Greek mathematician, geographer, poet, astronomer, and music theorist. He was a man of learning, becoming the chief librarian at the Library of Alexandria. He invented the discipline of geography, including the terminology used today. - The Humber is a large tidal estuary on the east coast of Northern England. It is formed at Trent Falls, Faxfleet, by the confluence of the tidal rivers Ouse and Trent. From here to the North Sea, it forms part of the boundary between the East Riding of Yorkshire on the north bank and Lincolnshire on the south bank. Although the Humber is an estuary from the point at which it is formed, many maps show it as the River Humber. - The University of Hull is a public university in Kingston upon Hull, a city in the East Riding of Yorkshire, England. It was founded in 1927 as University College Hull. The main university campus is located in Hull and is home to the Hull York Medical School, a joint initiative with the University of York. Students are served by Hull University Union. - England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west. The Irish Sea lies northwest of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five-eighths of the island of Great Britain (which lies in the North Atlantic) in its centre and south; and includes over 100 smaller islands such as the Isles of Scilly, and the Isle of Wight. - The pope (from "pappas", a child's word for "father") is the Bishop of Rome and, therefore, the leader of the worldwide Catholic Church. The primacy of the Roman bishop is largely derived from his role as the traditional successor to Saint Peter, to whom Jesus is supposed to have given the keys of Heaven and the powers of "binding and loosing", naming him as the "rock" upon which the church would be built. The current pope is Francis, who was elected on 13 March 2013, succeeding Benedict XVI. - The University of York (abbreviated as Ebor. for post-nominals) is a research-intensive plate glass university located in the city of York, England. Established in 1963, the campus university has expanded to more than thirty departments and centres, covering a wide range of subjects. - Geography (from Greek , "geographia", literally "earth description") is a field of science devoted to the study of the lands, the features, the inhabitants, and the phenomena of Earth. The first person to use the word "" was Eratosthenes (276194 BC). Geography is an all-encompassing discipline that seeks an understanding of the Earth and its human and natural complexitiesnot merely where objects are, but how they have changed and come to be. It is often defined in terms of the two branches of human geography and physical geography. The four historical traditions in geographical research are: spatial analyses of natural and the human phenomena, area studies of places and regions, studies of human-land relationships, and the Earth sciences. Geography has been called "the world discipline" and "the bridge between the human and the physical sciences". - Sonja Boehmer - Christiansen ( Born 1942 ) is an Emeritus Reader in the Department of Geography at the University of Hull in Kingston upon Hull England , where she taught environmental policy , management and politics . She has been editor of the journal Energy & Environment since 1998 . What entity does 'sonja boehmer-christiansen' has the relation 'occupation' with?
A:
geographer