Information: - Toronto is the most populous city in Canada, the provincial capital of Ontario, and the centre of the Greater Toronto Area, the most populous metropolitan area in Canada. Growing in population, the 2011 census recorded a population of 2,615,060. As of 2015, the population is now estimated at 2,826,498, making Toronto the fourth-largest city in North America based on the population within its city limits. Toronto trails only Mexico City, New York City, and Los Angeles by this measure, while it is the fifth-largest (behind also Chicago) if ranked by the size of its metropolitan area . An established global city, Toronto is an international centre of business, finance, arts, and culture, and widely recognized as one of the most multicultural and cosmopolitan cities in the world. - Robert George Brett ( November 16 , 1851 -- September 16 , 1929 ) was a politician and physician in the North - West Territories and later Alberta , Canada . Brett was well educated , attending the University of Toronto and attaining his medical degree . He attended various schools in the United States for his post graduate work . In 1874 he located in the small village of Arkona , Ontario , where he even served a term as village reeve . He was married in 1873 to Louise T. Hungerford and had four children , all four of whom predeceased their parents ( their eldest daughter , Genevieve , died as a four - month - old infant in October 1881 and is buried at Arkona ) . Although it has been stated that Brett moved to Manitoba in 1880 he and his family were listed in the 1881 census in Arkona . In any case in the early 1880s he helped found the Manitoba Medical College and sat as a board member on the University of Manitoba . In 1883 he moved to Banff , District of Alberta . He worked as a physician at the Banff Sanitarium , which he founded . In 1888 he was elected to the Legislative Assembly of the North - West Territories . He became a de facto leader of the government as chairman of the Lieutenant - Governor 's Advisory Council . Robert Brett had a rivalry with longtime member Frederick Haultain . In 1898 Robert Brett became the first Leader of the Official Opposition during a time in which the territorial legislature made a transition to party politics . He was elected in 1898 territorial election but his lead over opponent was so narrow that a by - election was held , which Arthur Sifton won . In the 1902 election he unexpectedly dropped out of the race , a move that hurt the North - West Territories Liberal Party . When Alberta became a province in 1905 he ran in Banff for the Conservative Party but was defeated . He served as a senior surgeon in Banff at Brett Hospital . In 1909 he became president of the Alberta Conservative Party . During his time in the early 20th century he served on a number of boards... - Rachel Anne Notley (born April 17, 1964) is a Canadian politician and the 17th and current Premier of Alberta, since 2015. She is a member of the Legislative Assembly of Alberta for Edmonton-Strathcona, and leader of the Alberta New Democratic Party. The daughter of former Alberta NDP leader Grant Notley, Notley's career before politics focused on labour law, with a specialty in workers' compensation advocacy and workplace health and safety issues. - Canada (French: ) is a country in the northern half of North America. Its ten provinces and three territories extend from the Atlantic to the Pacific and northward into the Arctic Ocean, covering , making it the world's second-largest country by total area and the fourth-largest country by land area. Canada's border with the United States is the world's longest land border. The majority of the country has a cold or severely cold winter climate, but southerly areas are warm in summer. Canada is sparsely populated, the majority of its land territory being dominated by forest and tundra and the Rocky Mountains. About four-fifths of the country's population of 36 million people is urbanized and live near the southern border. Its capital is Ottawa, its largest city is Toronto; other major urban areas include Montreal, Vancouver, Calgary, Edmonton, Quebec City, Winnipeg and Hamilton. - Alberta is a western province of Canada. With an estimated population of 4,196,457 as of July 1, 2015, it is Canada's fourth-most populous province and the most populous of Canada's three prairie provinces. Its area is about . Alberta and its neighbour Saskatchewan were districts of the Northwest Territories until they were established as provinces on September 1, 1905. The premier has been Rachel Notley since May 2015. After reading the paragraphs above, we are interested in knowing the entity with which 'robert brett' exhibits the relationship of 'position held'. Find the answer from the choices below. Choices: - 4 - leader - member of the legislative assembly - politician - york
member of the legislative assembly

*Question*
Information: - In physics, an orbit is the gravitationally curved path of an object around a point in space, for example the orbit of a planet about a star or a natural satellite around a planet. Normally, orbit refers to a regularly repeating path around a body, although it may occasionally be used for a non recurring trajectory or a path around a point in space. To a close approximation, planets and satellites follow elliptical orbits, with the central mass being orbited at a focal point of the ellipse, as described by Kepler's laws of planetary motion. - Union Observatory also known as Johannesburg Observatory (078) is a defunct astronomical observatory in Johannesburg, South Africa that was operated between 1903 and 1971. It is located on Observatory Ridge, the city's highest point at 1,808 metres altitude in the suburb Observatory. - A minor planet is an astronomical object in direct orbit around the Sun that is neither a planet nor exclusively classified as a comet. Minor planets can be dwarf planets, asteroids, trojans, centaurs, Kuiper belt objects, and other trans-Neptunian objects. As of 2016, the orbits of 709,706 minor planets were archived at the Minor Planet Center, 469,275 of which had received permanent numbers ). - Harry Edwin Wood (3 February 1881 27 February 1946) was an English astronomer, director of the Union Observatory in Johannesburg, and discoverer of minor planets. - 790 Pretoria is a minor planet orbiting the Sun that was discovered by English astronomer Harry Edwin Wood on January 16 , 1912 . It is a member of the Cybele group located beyond the core of the main belt ( see Minor planet groups ) . 10 radiometric data collected from Kitt Peak in 1975 gave a diameter estimate of 175 km. In the present day it is estimated to be 170 km ( 106 mi ) in diameter . Photometric measurements of the asteroid made in 2005 at the Palmer Divide Observatory showed a light curve with a period of 10.370 0.002 hours and a brightness variation of 0.08 0.03 in magnitude . - The Minor Planet Center (MPC) is the official worldwide organization in charge of collecting observational data for minor planets (such as asteroids) and comets, calculating their orbits and publishing this information via the "Minor Planet Circulars". Under the auspices of the International Astronomical Union, it operates at the Smithsonian Astrophysical Observatory, which is part of the Center for Astrophysics along with the Harvard College Observatory. After reading the paragraphs above, we are interested in knowing the entity with which '790 pretoria' exhibits the relationship of 'site of astronomical discovery'. Find the answer from the choices below. Choices: - harvard college observatory - kepler - union observatory
**Answer**
union observatory