Given the question: Information: - Combinatorics is a branch of mathematics concerning the study of finite or countable discrete structures. Aspects of combinatorics include counting the structures of a given kind and size (enumerative combinatorics), deciding when certain criteria can be met, and constructing and analyzing objects meeting the criteria (as in combinatorial designs and matroid theory), finding "largest", "smallest", or "optimal" objects (extremal combinatorics and combinatorial optimization), and studying combinatorial structures arising in an algebraic context, or applying algebraic techniques to combinatorial problems (algebraic combinatorics). - A lake is an area of variable size filled with water, localized in a basin, that is surrounded by land, apart from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, and therefore are distinct from lagoons, and are also larger and deeper than ponds, though there are no official or scientific definitions. Lakes can be contrasted with rivers or streams, which are usually flowing. Most lakes are fed and drained by rivers and streams. - A U.S. state is a constituent political entity of the United States of America. There are 50 states, which are bound together in a union with each other. Each state holds administrative jurisdiction over a defined geographic territory, and shares its sovereignty with the United States federal government. Due to the shared sovereignty between each state and the federal government, Americans are citizens of both the federal republic and of the state in which they reside. State citizenship and residency are flexible, and no government approval is required to move between states, except for persons covered by certain types of court orders (e.g., paroled convicts and children of divorced spouses who are sharing custody). - Algebra (from Arabic ""al-jabr"" meaning "reunion of broken parts") is one of the broad parts of mathematics, together with number theory, geometry and analysis. In its most general form, algebra is the study of mathematical symbols and the rules for manipulating these symbols; it is a unifying thread of almost all of mathematics. As such, it includes everything from elementary equation solving to the study of abstractions such as groups, rings, and fields. The more basic parts of algebra are called elementary algebra, the more abstract parts are called abstract algebra or modern algebra. Elementary algebra is generally considered to be essential for any study of mathematics, science, or engineering, as well as such applications as medicine and economics. Abstract algebra is a major area in advanced mathematics, studied primarily by professional mathematicians. - Combinatorial design theory is the part of combinatorial mathematics that deals with the existence, construction and properties of systems of finite sets whose arrangements satisfy generalized concepts of "balance" and/or "symmetry". These concepts are not made precise so that a wide range of objects can be thought of as being under the same umbrella. At times this might involve the numerical sizes of set intersections as in block designs, while at other times it could involve the spatial arrangement of entries in an array as in Sudoku grids. - Eridu (Cuneiform: NUN.KI ; Sumerian: eridu; Akkadian: "iritu" modern Arabic: Tell Abu Shahrain) is an archaeological site in southern Mesopotamia (modern Dhi Qar Governorate, Iraq). Eridu was long considered the earliest city in southern Mesopotamia and is still today argued to be the oldest city in the world. Located 12km southwest of Ur, Eridu was the southernmost of a conglomeration of Sumerian cities that grew around temples, almost in sight of one another. These buildings were made of mud brick and built on top of one another. With the temples growing upward and the village growing outward, a larger city was built. In Sumerian mythology, Eridu was originally the home of Enki, later known by the Akkadians as Ea, who was considered to have founded the city. His temple was called E-Abzu, as Enki was believed to live in Abzu, an aquifer from which all life was believed to stem. - A mathematician is someone who uses an extensive knowledge of mathematics in his/her work, typically to solve mathematical problems. - Gilbert de Beauregard Robinson (19061992) was a Canadian mathematician most famous for his work on combinatorics and representation theory of the symmetric groups, including the Robinson-Schensted algorithm. - In applied mathematics and theoretical computer science, combinatorial optimization is a topic that consists of finding an optimal object from a finite set of objects. In many such problems, exhaustive search is not feasible. It operates on the domain of those optimization problems, in which the set of feasible solutions is discrete or can be reduced to discrete, and in which the goal is to find the best solution. Some common problems involving combinatorial optimization are the travelling salesman problem ("TSP") and the minimum spanning tree problem ("MST"). - Portland is the largest city in the U.S. state of Maine. Portland had a population of 66,881 in 2015. The Greater Portland metropolitan area is home to over half a million people, more than one-third of Maine's total population. The Old Port district is frequented by tourists, while Portland Head Light is also a destination. The city seal depicts a phoenix rising from ashes, which is a reference to the recoveries from four devastating fires. Portland was named for the English Isle of Portland, and the city of Portland, Oregon was in turn named after Portland, Maine. - Craige Eugene Schensted is a physicist who first formulated the insertion algorithm ( Schensted 1961 ) that defines the Robinson -- Schensted correspondence ; under a different form , that correspondence had earlier been described by Gilbert de Beauregard Robinson in 1938 , but it is due to the Schensted insertion algorithm that the correspondence has become widely known in combinatorics . Schensted also designed several board games including * Star , Star , and Y. In 1995 , he changed his name to Ea , the Babylonian name for the Sumerian god Enki , and in 1999 changed it to Ea Ea . He lived on Peaks Island in Portland , Maine . - Babylon (or ; Aramaic: , "Babel", , "Bavel", , "Bbil") was a major city of ancient Mesopotamia in the fertile plain between the Tigris and Euphrates rivers. The city was built upon the Euphrates and divided in equal parts along its left and right banks, with steep embankments to contain the river's seasonal floods. Babylon was originally a small Semitic Akkadian city dating from the period of the Akkadian Empire c. 2300 BC. - Portland Head Light is a historic lighthouse in Cape Elizabeth, Maine. The light station sits on a head of land at the entrance of the primary shipping channel into Portland Harbor, which is within Casco Bay in the Gulf of Maine. Completed in 1791, it is the oldest lighthouse in the state of Maine. The light station is automated, and the tower, beacon, and foghorn are maintained by the United States Coast Guard, while the former lighthouse keepers' house is a maritime museum within Fort Williams Park. - Enki (Sumerian: ) is a god in Sumerian mythology, later known as Ea in Akkadian and Babylonian mythology. He was originally patron god of the city of Eridu, but later the influence of his cult spread throughout Mesopotamia and to the Canaanites, Hittites and Hurrians. He was the deity of crafts ("gasam"); mischief; water, seawater, lakewater ("a", "aba", "ab"), intelligence ("gestu", literally "ear") and creation ("Nudimmud": "nu", likeness, "dim mud", make beer). He was associated with the southern band of constellations called "stars of Ea", but also with the constellation AS-IKU, "the Field" (Square of Pegasus). Beginning around the second millennium BCE, he was sometimes referred to in writing by the numeric ideogram for "40," occasionally referred to as his "sacred number." The planet Mercury, associated with Babylonian "Nabu" (the son of Marduk) was in Sumerian times, identified with Enki. 'craige schensted' is related to which object entity through the relation of 'occupation'? Choices: - band - computer - construction - general - guard - major - mathematician - nun - official - science - united states of america
The answer is:
mathematician