Question: How many municipalities are in the area, sometimes referred to as metro area, greater area, commuter belt or conurbation of the capital and largest city of the Brazilian state of Paraná?

Context articles: Resistencia, Chaco
Greater Mexico City
Metropolitan area
Teresina
Palmas, Paraná
Curitiba
Coruripe
London commuter belt
Copenhagen metropolitan area
Porto Alegre

Resistencia (] ) is the capital and largest city of the province of Chaco in north-eastern Argentina.
 According to the 2010 census, the population of the city proper was 291,720 inhabitants.
 It is the anchor of a larger metropolitan area, Greater Resistencia, which comprises three more municipalities for a total population of 387,340 as of 2010.
 This conurbation is the largest in the province, and the eleventh most populous in the country.
 It is located along the Negro River, a tributary of the much larger Paraná River, opposite the city of Corrientes, Corrientes Province.
Greater Mexico City refers to the conurbation around Mexico City, officially called Valley of Mexico Metropolitan Area ("Zona Metropolitana del Valle de México"), constituted by Mexico City itself composed of 16 Municipalities—and 41 adjacent municipalities of the states of Mexico and Hidalgo.
 For normative purposes, however, Greater Mexico City most commonly refers to the Metropolitan Area of the Valley of Mexico ("Zona Metropolitana del Valle de México") an agglomeration that incorporates 18 additional municipalities.
 As of 2010 Census, Greater Mexico City had a population just over 20 million, making it the largest metropolitan area in North America just ahead of the New York metropolitan area.
 But as of a 2014 census, it's estimated the population of Greater Mexico City was 25.4 million people, making it the largest urban agglomeration in the western hemisphere.
 It is surrounded by thin strips of highlands which separate it from other adjacent metropolitan areas, of which the biggest are Puebla, Toluca, and Cuernavaca-Cuautla, and together with which it makes up the Mexico City megalopolis.
A metropolitan area, sometimes referred to as a metro area, greater area, commuter belt or conurbation, is a region consisting of a densely populated urban core and its less-populated surrounding territories, sharing industry, infrastructure, and housing.
Teresina is the capital and most populous municipality in the Brazilian state of Piauí.
 Being located in North-central Piauí 366 km from the coast, it is the only capital in the Brazilian Northeast that is not located on the shores of the Atlantic Ocean.
 With 814,439 inhabitants, Teresina is the 19th largest city in Brazil, and the 15th largest state capital in the country.
 Together with Timon in the nearby state of Maranhão, it forms a conurbation with a population of about 953,172 inhabitants; the entire metropolitan region of Teresina has over 1,135,920 inhabitants.
 The only natural barrier that separates Teresina from Timon is the Parnaíba river, one of the largest in the Northeast.
Palmas is a municipality in the south of the Brazilian state of Paraná.
 Palmas is located in the mountainous area of Paraná and is in the mesoregion of Southcentral Paraná.
 Palmas is the capital of the microregion of the same name.
 The population is 47,674 (2015 est.) in an area of 1557.90 km².
 The elevation is 1,056 m.
Curitiba ( "Pine Nut Land", ] ) is the capital and largest city of the Brazilian state of Paraná.
 The city's population numbered approximately 1,879,355 people as of 2015 , making it the eighth most populous city in the country, and the largest in Brazil's South Region.
 The Curitiba Metropolitan area comprises 26 municipalities with a total population of over 3.2 million (IBGE estimate in 2010), making it the seventh most populous in the country.
Coruripe is a municipality located in the southern coast of the Brazilian state of Alagoas.
 Its population is 44,272 (2005) and its area is 913 km².
 It is the largest municipality in Alagoas by area, but among the largest municipalities of each Brazilian state, it is the smallest.
 It is situated at the edge of Coruripe river.
The London commuter belt is a metropolitan area that includes London and its surrounding commuter zone (the area in which it is practical to commute to work in London).
 It is also known as the London metropolitan area, or Southeast metropolitan area.
 It should not be confused with Greater London or the Greater London Built-up Area.
The Copenhagen metropolitan area or Metropolitan Copenhagen (Danish: "Hovedstadsområdet" , literally "The Capital Area") is a large commuter belt (the area in which it is practical to commute to work) surrounding Copenhagen, the capital of Denmark.
 It is known to include Copenhagen Municipality, Frederiksberg and surrounding municipalities stretching westward across Zealand.
 It has densely-populated core surrounded by suburban settlements.
Porto Alegre ( ] ; "Joyful Harbor") is the capital and largest city of the Brazilian state of Rio Grande do Sul.
 Founded in 1769 by Manuel Sepúlveda, its population of 1,481,019 inhabitants (2016) makes it the tenth most populous city in the country and the centre of Brazil's fifth largest metropolitan area, with 4,405,760 inhabitants (2010).
 The city is the southernmost capital city of a Brazilian state.