<Tr> <Td_colspan="2"> </Td> <Td> </Td> <Td> <Table> <Tr> <Td> </Td> </Tr> </Table> </Td> <Td> </Td> <Td_colspan="2"> Chungkai POW Camp </Td> </Tr> <Table> <Tr> <Td> </Td> </Tr> </Table> <Tr> <Td_colspan="2"> </Td> <Td> </Td> <Td> <Table> <Tr> <Td> </Td> </Tr> </Table> </Td> <Td> </Td> <Td_colspan="2"> Wang Lan </Td> </Tr> <Table> <Tr> <Td> </Td> </Tr> </Table>

When was the bridge over river kwai built