<Tr> <Td_colspan="2"> <Ul> <Li> Steel Curtain (Defensive line, 1969--1981) </Li> <Li> Steeler Nation </Li> </Ul> </Td> </Tr> <Ul> <Li> Steel Curtain (Defensive line, 1969--1981) </Li> <Li> Steeler Nation </Li> </Ul> <Li> Steel Curtain (Defensive line, 1969--1981) </Li> <Tr> <Th_colspan="2"> Championships </Th> </Tr>

Who did the steelers beat to win the superbowl