<Tr> <Th> Length </Th> <Td> 4: 29 </Td> </Tr> <Tr> <Th> Label </Th> <Td> Parlophone </Td> </Tr> <Tr> <Th> Songwriter (s) </Th> <Td> <Ul> <Li> Chris Martin </Li> <Li> Jonny Buckland </Li> <Li> Guy Berryman </Li> <Li> Will Champion </Li> </Ul> </Td> </Tr> <Ul> <Li> Chris Martin </Li> <Li> Jonny Buckland </Li> <Li> Guy Berryman </Li> <Li> Will Champion </Li> </Ul>

What is the song yellow about by coldplay