<Tr> <Th> Label </Th> <Td> <Ul> <Li> Harvest (UK) </Li> <Li> Columbia (US) </Li> </Ul> </Td> </Tr> <Ul> <Li> Harvest (UK) </Li> <Li> Columbia (US) </Li> </Ul> <Li> Harvest (UK) </Li> <Li> Columbia (US) </Li>

Who sang lead vocals on another brick in the wall