Title: Piauí
Content:  Piaui is one of the states of Brazil, located in the country's Northeast Region. The state has 1.6% of the Brazilian population and produces 0.7% of the Brazilian GDP. Piaui has the shortest coastline of any coastal Brazilian state at 66 km (41 mi), and the capital, Teresina, is the only state capital in the northeast to be located inland. The reason for this is, unlike the rest of the area, Piaui was first colonised inland and slowly expanded towards the ocean, rather than the other way around. In the southeast of the state, the National Park of Serra da Capivara is a UNESCO World Heritage Site. The park has more than 400 archaeological sites and the largest concentration of rock paintings in the world, in a landscape dominated by canyons and caatinga.
Title: Piauí
Content: Teresina ; Parnaíba ; Picos ; Oeiras ; Avelino Lopes ; Curimata Cities in Piaui include:
Title: Porto, Piauí
Content:  Porto, Piauí is a municipality in the state of Piauí in the Northeast region of Brazil.
Title: Legislative Assembly of Piauí
Content:  The Legislative Assembly of Piauí (Assembleia Legislativa do Piauí) is the unicameral legislature of the Brazilian state of Piauí. The assembly, which is seated in the state capital of Teresina, is composed of has 30 state deputies elected by proportional representation.
Title: List of municipalities in Piauí
Content:  This is a list of the municipalities in the state of Piauí (PI), located in the Northeast Region of Brazil. Piauí is divided into 224 municipalities, which are grouped into 15 microregions, which are grouped into 4 mesoregions. 
Title: List of capitals of subdivisions of Brazil
Content: Parnaíba (1718–1759) - seat city for the Captaincy of Piauí (subject to Maranhão) ; Oeiras (1759–1811) - seat city for the Captaincy of Piauí (subject to Maranhão) ; Oeiras (1811–1822) - seat city for the Captaincy of Piauí ; Oeiras (1822–1852) - seat city for the Province of Piauí ; Teresina (1852–1889) - seat city for the Province of Piauí ; Teresina (1889–present) - seat city for the State of Piauí created out of Maranhão
Title: Piauí River (Sergipe)
Content:  The Piauí River is a river of Sergipe state in northeastern Brazil.
Title: Picos
Content:  Picos is a municipality in the state of Piauí in the Northeast region of Brazil. Picos is the state's third-largest city, located in the south-central region of Piauí and is the most economically developed city in the region. The city's financial prosperity, combined with its geographical location, gives Picos a "commercial hub" status, especially for fuel and honey (Picos is known as the "capital of honey"). As of 2020, the population was approximately 78,431.
Title: Piauí River
Content:  The Piauí River is a river of Piauí state in northeastern Brazil.
Title: Teresina
Content:  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 868,075 inhabitants, Teresina is the 21st 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 

Question: What is the capital of Piauí?
Answer: Teresina.