<Tr> <Th> United States </Th> <Td> December 11, 2014 (2014 - 12 - 11) </Td> <Td> Digital download </Td> <Td> <Ul> <Li> ARTium </Li> <Li> Def Jam </Li> <Li> Columbia </Li> </Ul> </Td> <Td> </Td> </Tr> <Ul> <Li> ARTium </Li> <Li> Def Jam </Li> <Li> Columbia </Li> </Ul> <Tr> <Th> United Kingdom </Th> <Td> </Td> </Tr>

What is the song glory by john legend about