What are the date of ceremony of music festivals with category "Best Song" and result "Awarded"?
return music festivals ;return ceremonies of #1 ;return categories of #2 ;return result of #2 ;return #2 where #3 is Best Song ;return #2 where #4 is Awarded ;return #2 in  both #5 and  #6 ;return dates of #7
['select', 'project', 'project', 'project', 'comparative', 'comparative', 'intersection', 'project']