<Tr> <Th> Genres </Th> <Td> <Ul> <Li> Hard rock </Li> <Li> blues rock </Li> <Li> folk rock </Li> <Li> heavy metal </Li> </Ul> </Td> </Tr> <Ul> <Li> Hard rock </Li> <Li> blues rock </Li> <Li> folk rock </Li> <Li> heavy metal </Li> </Ul> <Tr> <Th> Years active </Th> <Td> 1968--1980 (reunions: 1985, 1988, 1995, 2007) </Td> </Tr> <Tr> <Th> Labels </Th> <Td> <Ul> <Li> Atlantic </Li> <Li> Swan Song </Li> </Ul> </Td> </Tr>

When did the lead singer of led zeppelin die