Return the dates of ceremony corresponding to music festivals that had the category "Best Song" and result "Awarded".
return music festivals ;return categories of  #1 ;return #1 where  #2 is Best Song ;return result of  #1 ;return #1 where  #4 is Awarded ;return #1 of  both #3 and #5 ;return dates of  ceremonies of #6
['select', 'project', 'comparative', 'project', 'comparative', 'intersection', 'project']