<Li> Upper house (Senate) </Li> <Tr> <Th> Parliament </Th> </Tr> <Tr> <Td> <Ul> <Li> Parliamentary system </Li> <Li> Parliamentary group </Li> </Ul> <Ul> <Li> Member of parliament </Li> <Li> International parliament </Li> </Ul> </Td> </Tr> <Ul> <Li> Parliamentary system </Li> <Li> Parliamentary group </Li> </Ul>

Where did the idea of a bicameral legislature come from