<Table> <Tr> <Th_colspan="2"> ABBA </Th> </Tr> <Tr> <Td_colspan="2"> ABBA in 1974 (from left) Benny Andersson, Anni - Frid Lyngstad (Frida), Agnetha Fältskog, and Björn Ulvaeus </Td> </Tr> <Tr> <Th_colspan="2"> Background information </Th> </Tr> <Tr> <Th> Also known as </Th> <Td> Björn & Benny, Agnetha & Anni - Frid </Td> </Tr> <Tr> <Th> Origin </Th> <Td> Stockholm, Sweden </Td> </Tr> <Tr> <Th> Genres </Th> <Td> <Ul> <Li> Pop </Li> <Li> disco </Li> <Li> pop rock </Li> </Ul> </Td> </Tr> <Tr> <Th> Years active </Th> <Td> 1972--1982, 2018--present </Td> </Tr> <Tr> <Th> Labels </Th> <Td> <Ul> <Li> Polar </Li> <Li> Polydor </Li> <Li> Atlantic </Li> <Li> Epic </Li> <Li> RCA Victor </Li> <Li> Vogue </Li> <Li> Sunshine </Li> </Ul> </Td> </Tr> <Tr> <Th> Associated acts </Th> <Td> <Ul> <Li> Hep Stars </Li> <Li> Hootenanny Singers </Li> <Li> Benny Anderssons orkester </Li> </Ul> </Td> </Tr> <Tr> <Th> Website </Th> <Td> abbasite.com </Td> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> <Tr> <Th> Members </Th> <Td> <Ul> <Li> Agnetha Fältskog </Li> <Li> Björn Ulvaeus </Li> <Li> Benny Andersson </Li> <Li> Anni - Frid Lyngstad </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> ABBA </Th> </Tr>

What were the names of the group abba