Information: - The World Rally Championship (WRC) is a rallying series organised by the FIA, culminating with a champion driver and manufacturer. The driver's world championship and manufacturer's world championship are separate championships, but based on the same point system. The series currently consists of 13 three-day events driven on surfaces ranging from gravel and tarmac to snow and ice. Each rally is split into 1525 special stages which are run against the clock on closed roads. - Latin America is a group of countries and dependencies in the Americas where Romance languages are predominant. The term originated in 19th century France as "Amerique latine" to consider French-speaking territories in the Americas (Haiti, French Guiana, Martinique, Guadeloupe, Saint Martin, Saint Barthelemy) along with the larger group of countries where Spanish and Portuguese languages prevailed. It is therefore broader than the terms Ibero-America or Hispanic Americathough it usually excludes French Canada and modern French Louisiana. - Rally Brazil is the largest rally racing event held in South America . Currently part of the South American Rally Championship ( SARC ) , it has been incorporated into the World Rally Championship ( WRC ) calendar , in 1981 and 1982 . - Rallying is a form of motorsport that takes place on public or private roads with modified production or specially built road-legal cars. It is distinguished by running not on a circuit, but instead in a point-to-point format in which participants and their co-drivers drive between set control points (special stages), leaving at regular intervals from one or more start points. Rallies may be won by pure speed within the stages or alternatively by driving to a predetermined ideal journey time within the stages. - South America is a continent located in the western hemisphere, mostly in the southern hemisphere, with a relatively small portion in the northern hemisphere. It is also considered a subcontinent of the Americas, which is the model used in nations that speak Romance languages. The reference to South America instead of other regions (like Latin America or the Southern Cone) has increased in the last decades due to changing geopolitical dynamics (in particular, the rise of Brazil). Given the information above, choose from the list below the object entity that exhibits the relation 'sport' with the subject 'rally of brazil'. Choices: - motorsport - rally - rallying - running - spanish
motorsport

*Question*
Information: - In the mathematical field of descriptive set theory, a subset formula_1 of a Polish space formula_2 is projective if it is formula_3 for some positive integer formula_4. Here formula_1 is - In mathematics, the axiom of determinacy (abbreviated as AD) is a possible axiom for set theory introduced by Jan Mycielski and Hugo Steinhaus in 1962. It refers to certain two-person topological games of length . AD states that every game of a certain type is determined; that is, one of the two players has a winning strategy. - In the mathematical discipline of general topology, a Polish space is a separable completely metrizable topological space; that is, a space homeomorphic to a complete metric space that has a countable dense subset. Polish spaces are so named because they were first extensively studied by Polish topologists and logicians Sierpiski, Kuratowski, Tarski and others. However, Polish spaces are mostly studied today because they are the primary setting for descriptive set theory, including the study of Borel equivalence relations. Polish spaces are also a convenient setting for more advanced measure theory, in particular in probability theory. - Steve Jackson ( full name : Stephen Craig Jackson ) is an American set theorist at University of North Texas . Much of his most notable work has involved the descriptive set - theoretic consequences of the axiom of determinacy . In particular he is known for having calculated the values of all the projective ordinals ( the suprema of the lengths of all prewellorderings of the reals at a particular level in the projective hierarchy ) under the assumption that the axiom of determinacy holds . In recent years he has also made contributions to the theory of Borel equivalence relations . With Dan Mauldin he solved the Steinhaus lattice problem . Jackson earned his Ph.D. in 1983 at UCLA under the direction of Donald A. Martin , with a dissertation on A Calculation of 15 . In it , he proved that , under AD , \ mathbf ( \ delta ^ 1 -- 5 ) = \ aleph -- ( \ omega ^ ( \ omega ^ ( \ omega ) ) +1 ) thereby solving the first Victoria Delfino problem , one of the notorious problems of the combinatorics of the axiom of determinacy . - Nonsectarian institutions are secular private educational institutions or other organizations not affiliated with or restricted to a particular religious group. - The University of North Texas (UNT), based in Denton, is a public institution of higher education and research committed to a wide array of sciences, engineering fields, liberal arts, fine arts, performing arts, humanities, public policy, and graduate professional education. Ten colleges, two schools, an early admissions math and science academy for exceptional high-school-age students from across the state, and a library system comprise the university core. Its research is driven by about 34 doctoral degree programs. During the 20132014 school year, the university had a budget of $865 million, of which $40 million was allocated for research. North Texas was founded as a nonsectarian, coeducational, private teachers college in 1890; and, as a collaborative development in response to enrollment growth and public demand, its trustees ceded control to the state in 1899. In 1901, North Texas was formally adopted by the State. - A topological game is an infinite game of perfect information played between two players on a topological space. Players choose objects with topological properties such as points, open sets, closed sets and open coverings. Time is generally discrete, but the plays may have transfinite lengths, and extensions to continuum time have been put forth. The conditions for a player to win can involve notions like topological closure and convergence. - Wadysaw Hugo Dionizy Steinhaus (January 14, 1887 February 25, 1972) was a Polish mathematician and educator. Steinhaus obtained his PhD under David Hilbert at Gottingen University in 1911 and later became a professor at the Jan Kazimierz University in Lwow (now Lviv, Ukraine), where he helped establish what later became known as the Lwow School of Mathematics. He is credited with "discovering" mathematician Stefan Banach, with whom he gave a notable contribution to functional analysis through the BanachSteinhaus theorem. After World War II Steinhaus played an important part in the establishment of the mathematics department at Wrocaw University and in the revival of Polish mathematics from the destruction of the war. - In mathematical logic, descriptive set theory is the study of certain classes of "well-behaved" subsets of the real line and other Polish spaces. As well as being one of the primary areas of research in set theory, it has applications to other areas of mathematics such as functional analysis, ergodic theory, the study of operator algebras and group actions, and mathematical logic. Given the information above, choose from the list below the object entity that exhibits the relation 'occupation' with the subject 'steve jackson '. Choices: - engineering - game - general - mathematician - professor - religious - research - science
**Answer**
mathematician