<Tr> <Td> 7 </Td> <Td> Salvador </Td> <Td> Bahia </Td> <Td> 3,984,583 </Td> <Td> 17 </Td> <Td> Baixada Santista </Td> <Td> São Paulo </Td> <Td> 1,813,033 </Td> </Tr> <Tr> <Td> 8 </Td> <Td> Recife </Td> <Td> Pernambuco </Td> <Td> 3,940,456 </Td> <Td> 18 </Td> <Td> São Luís </Td> <Td> Maranhão </Td> <Td> 1,605,305 </Td> </Tr> <Tr> <Td> 9 </Td> <Td> Curitiba </Td> <Td> Paraná </Td> <Td> 3,537,894 </Td> <Td> 19 </Td> <Td> Natal </Td> <Td> Rio Grande do Norte </Td> <Td> 1,537,211 </Td> </Tr> <Tr> <Td> 10 </Td> <Td> Campinas </Td> <Td> São Paulo </Td> <Td> 3,131,528 </Td> <Td> 20 </Td> <Td> Piracicaba </Td> <Td> São Paulo </Td> <Td> 1,452,691 </Td> </Tr>

What is urban area and a rural area