<Tr> <Td> Toronto </Td> <Td> 6,054,191 </Td> <Td> 5,906 km (2,280 sq mi) </Td> <Td> Canada </Td> </Tr> <Tr> <Td> Philadelphia </Td> <Td> 6,034,678 </Td> <Td> 13,256 km (5,118 sq mi) </Td> <Td> United States </Td> </Tr> <Tr> <Td> Washington, D.C. </Td> <Td> 5,949,859 </Td> <Td> 14,412 km (5,565 sq mi) </Td> <Td> United States </Td> </Tr> <Tr> <Td> Miami </Td> <Td> 5,828,191 </Td> <Td> 15,896 km (6,137 sq mi) </Td> <Td> United States </Td> </Tr>

What are the three countries that make up north america