Question: Information: - Petrus ( '' Piet '' ) Johannes Keizer ( born 14 June 1943 in Amsterdam ) is a retired Dutch professional football player . Keizer was a part of the Total Football Ajax Amsterdam team of the 1960s and 1970s , particularly notable during the managerial tenures of Rinus Michels and Stefan Kovacs ( 1965 - 1973 ) . he is widely considered as one of the greatest players in the history of Netherlands . Dutch writer Nico Scheepmaker said Keizer was '' Cruyff is the best , but Keizer is the better one '' . - Total Football is a tactical theory of football in which any outfield player can take over the role of any other player in a team. It was made famous by the Netherlands National Football Team in the 1974 FIFA World Cup. Early exponents of Total Football were Real Madrid, Brazilian side Santos, the Golden Team of Hungary and English side Burnley in the 1950s. - The Kingdom of the Netherlands , commonly known as the Netherlands, is a sovereign state and constitutional monarchy with territory in western Europe and in the Caribbean. - The Golden Team (also known as the Mighty Magyars, the Marvellous Magyars, the Magnificent Magyars, or the Magical Magyars) refers to the Hungary national football team of the 1950s. It is associated with several notable matches, including the "Match of the Century" against England in 1953, and the quarter-final ("Battle of Berne") against Brazil, semi-final (against Uruguay) and final ("Miracle of Bern") of the 1954 FIFA World Cup. The team inflicted notable defeats on then-footballing world powers England, Uruguay and the Soviet Union, before the 1956 Hungarian Revolution caused the breakup of the side. - Amsterdam is the capital and most populous municipality of the Kingdom of the Netherlands. Its status as the capital is mandated by the Constitution of the Netherlands, although it is not the seat of the government, which is The Hague. Amsterdam has a population of 847,176 within the city proper, 1,343,647 in the urban area, and 2,431,000 in the Amsterdam metropolitan area. The city is located in the province of North Holland in the west of the country. The metropolitan area comprises much of the northern part of the Randstad, one of the larger conurbations in Europe, with a population of approximately 7million. - Marinus "Rinus" Jacobus Hendricus Michels (9 February 1928 3 March 2005) was a Dutch association football player and coach. He played his entire career for the club AFC Ajax, which he later coached, and was a member of the Netherlands national team both as a player and as manager. - A conurbation is a region comprising a number of cities, large towns, and other urban areas that, through population growth and physical expansion, have merged to form one continuous urban or industrially developed area. In most cases, a conurbation is a polycentric urbanised area, in which transportation has developed to link areas to create a single urban labour market or travel to work area. - Brazil, officially the Federative Republic of Brazil, is the largest country in both South America and Latin America. As the world's fifth-largest country by both area and population, it is the largest country to have Portuguese as an official language and the only one in the Americas. Bounded by the Atlantic Ocean on the east, Brazil has a coastline of . It borders all other South American countries except Ecuador and Chile and covers 47.3% of the continent's land area. Its Amazon River basin includes a vast tropical forest, home to diverse wildlife, a variety of ecological systems, and extensive natural resources spanning numerous protected habitats. This unique environmental heritage makes Brazil one of 17 megadiverse countries, and is the subject of significant global interest and debate regarding deforestation and environmental protection. - The Constitution for the Kingdom of the Netherlands is one of two fundamental documents governing the Kingdom of the Netherlands as well as the fundamental law of the European territory of the Kingdom of the Netherlands. The present constitution is generally seen as directly derived from the one issued in 1815, constituting a constitutional monarchy. A revision in 1848 instituted a system of parliamentary democracy. In 1983, a major revision of the constitution was undertaken, almost fully rewriting the text and adding new civil rights. The text is very sober, devoid of legal or political doctrine. It includes a bill of rights. The constitution prohibits the judiciary to test laws and treaties against the constitution, as this is considered a prerogative of the legislature. There is no constitutional court in the Netherlands, except for the Constitutional Court of Sint Maarten which only governs the Sint Maarten legislator. The Kingdom of the Netherlands also includes Aruba, Curacao and Sint Maarten: there is an overarching instrument of the entire kingdom that has constitution characterisics: the Statute of the Kingdom of the Netherlands. - Amsterdamsche Football Club Ajax, also AFC Ajax, Ajax Amsterdam or simply Ajax, is a Dutch professional football club based in Amsterdam. Historically, Ajax (named after the legendary Greek hero) is the most successful club in the Netherlands, with 33 Eredivisie titles and 18 KNVB Cups. It has continuously played in the Eredivisie, the Dutch football top division, since its inception in 1956 and, along with Feyenoord and PSV, it is one of the country's "big three" clubs that have dominated that competition. - The outfield is a sporting term used in cricket and baseball to refer to the area of the field of play further from the batsman or batter than the infield, and in association football to players outside the goal. - The 1974 FIFA World Cup, the tenth staging of the World Cup, was held in West Germany (including West Berlin) from 13 June to 7 July. The tournament marked the first time that the current trophy, the FIFA World Cup Trophy, created by the Italian sculptor Silvio Gazzaniga, was awarded. The previous trophy, the Jules Rimet Trophy, had been won for the third time by Brazil in 1970 and awarded permanently to the Brazilians. The host nation won the title beating the Netherlands in the final, 21. The victory was the second for West Germany, who had also won in 1954. Australia, East Germany, Haiti and Zaire made their first appearances at the final stage, and the Netherlands and Poland their first since 1938. What entity does 'piet keizer' has the relation 'occupation' with?
Answer:
association football player