Title: Rondônia
Content:  Rondônia is one of the 26 states of Brazil, located in the northern subdivision of the country (central-western part). To the west is a short border with the state of Acre, to the north is the state of Amazonas, in the east is Mato Grosso, and in the south and southwest is Bolivia. Rondônia has a population of 1,755,000 as of 2014. It is the fifth least populated state. Its capital and largest city is Porto Velho. The state was named after Cândido Rondon, who explored the north of the country during the 1910s. The state, which is home to 0.8% of the Brazilian population, is responsible for 0.6% of the Brazilian GDP.
Title: Rondônia
Content:  Governador Jorge Teixeira de Oliveira International Airport is located in the state capital of Porto Velho.
Title: Rondonópolis
Content:  Rondonópolis (formerly known as Rio Vermelho (Red River)) is the third-largest municipality in Mato Grosso, Brazil. It is located around 215 km from Cuiabá, the capital of the state. The city is named for military officer and explorer Cândido Rondon.
Title: Porto Velho
Content:  Porto Velho (, Old Port) is the capital of the Brazilian state of Rondônia, in the upper Amazon River basin, and a Catholic Metropolitan Archbishopric. The population is 539,354 people (as of the IBGE 2020 estimation). Located on the border of Rondônia and the state of Amazonas, the town is an important trading center for cassiterite, the mining of which represents the most important economic activity in the region, as well as a transportation and communication center. It is on the eastern shore of the Madeira River, one of the main tributaries of the Amazon River. It is also Rondônia's largest city, and the largest state capital of Brazil by area. The municipality occupies most of the border between Amazonas and Rondônia, and is both the westernmost and northernmost city in the state.
Title: Rondolândia
Content:  Rondolandia was created in 1998. Rondolândia received status of municipality and district by state law No. 6984 of January 28, 1998, with territory taken from Aripuanã. The municipality of Rondolândia is geographically located in Mato Grosso, but historically the majority of the population has a greater connection with Ji-Paraná and Rondônia Cacoal belonging to, because it is too far from the cities of Mato Grosso. Access the state capital and other cities usually occurs through Rondônia, and follows the time zone RO. In this city every year in May the city mobilizes to the Feast of the Patroness Our Lady Help of Christians, which attracts people from various other locations. The municipality holds part of the 164224 ha Guariba-Roosevelt Extractive Reserve, a sustainable use unit created in 1996.
Title: List of municipalities in Rondônia
Content:  This is a list of the municipalities in the state of Rondônia (RO), located in the North Region of Brazil. Rondônia is divided into 52 municipalities, which are grouped into 8 microregions, which are grouped into 2 mesoregions. 
Title: History of Rondônia
Content:  governor designated Vila Bela da Santíssima Trindade as the capital, from where he commanded the border demarcation following the Treaty of Madrid (1750). In 1753, he installed a surveillance post in the village of Santa Rosa Velha, built by the Spanish on the right bank of the Guaporé, and thus in Brazilian lands. In 1759, the Spanish governor of Santa Cruz de la Sierra requested that the post be evacuated. Instead, Rolim de Moura built a fort to replace it, which became known as the Presídio de Nossa Senhora da Conceição. Due to the climate and the incursions of the Spanish, 
Title: Rondinha
Content:  Rondinha is a municipality in the state of Rio Grande do Sul, Brazil. It was established in 2000. As of 2020, the estimated population was 5,080.
Title: Rondón, Boyacá
Content:  Rondón is a town and municipality in the Márquez Province, part of Boyacá Department, Colombia. The urban centre of Rondón is situated at an altitude of 2075 m on the Altiplano Cundiboyacense in the Colombian Eastern Ranges of the Andes. It is 61 km away from the departmental capital Tunja. Rondón borders Viracachá and Siachoque in the north, Zetaquirá and Ramiriquí in the south, Pesca in the east and Ramiriquí and Ciénega in the west.
Title: Rondônia
Content:  The economy of the state of Rondônia has, as main activities, agriculture, livestock, food industry and vegetal and mineral extraction. In 2016, the state's GDP reached R$ 39.451 billion. Its export basket is mainly composed of frozen beef (43.43%), soy (32.77%), raw tin (7.08%), sawn wood (2.36%) and edible giblets (2.02%). Beginning in the 1970s, the state attracted farmers from the south-central part of the country, stimulated by the federal government's colonization projects and the availability of cheap and fertile land. The development of agricultural activities has transformed the area into one of the main agricultural frontiers in the country and one of the most prosperous and productive regions in northern Brazil. The state stands out 

Question: What is the capital of Rondônia?
Answer: Porto Velho.