<Tr> <Th_colspan="2"> "Black Betty" </Th> </Tr> <Tr> <Th_colspan="2"> Single by Spiderbait </Th> </Tr> <Tr> <Th_colspan="2"> from the album Tonight Alright </Th> </Tr> <Tr> <Th> Released </Th> <Td> February 2004 (2004 - 02) </Td> </Tr>

What is the meaning behind the song black betty