<Tr> <Td> Irish Singles Chart </Td> <Td> </Td> </Tr> <Tr> <Td> New Zealand Singles Chart </Td> <Td> </Td> </Tr> <Tr> <Td> Swiss Singles Top 100 </Td> <Td> 25 </Td> </Tr> <Tr> <Td> UK Singles (Official Charts Company) </Td> <Td> 7 </Td> </Tr>

What does the song one by u2 mean