Who was behind the quote , “ You can not write a song any better than that , because that 's how this kind of thing happens in real life ” ?
She explained in a 1999 interview with " The Guardian " : " Harry had to be an orphan — so that he 's a free agent , with no fear of letting down his parents , disappointing them ... Hogwarts has to be a boarding school — half the important stuff happens at night !