query: What is the population of Rio, Brazil?
passage: Demographics of Rio de Janeiro
Rio de Janeiro City is home to more than 6million people, accounting for about 35% of the population of Rio de Janeiro State. Portuguese remains the most widely spoken language and Rio de Janeiro is the second city in the Portuguese speaking world.
passage: Rio de Janeiro (state)
Sports are a very popular pastime in Rio de Janeiro. The most popular is association football. Rio de Janeiro is home to four traditional Brazilian football clubs: Flamengo, Vasco, Fluminense and Botafogo. The state football league is Campeonato Carioca. The city of Rio de Janeiro hosted the 2014 FIFA World Cup. The city built a new stadium near the Maracanã, to hold 45,000 people. It was named after Brazilian ex-FIFA president João Havelange.