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?
Sentence (from "Curitiba"): 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.
Relevant evidence: No