For grants with both documents described as 'Regular' and documents described as 'Initial Application', list its start date.
return grants ;return documents of #1 ;return #2 described as 'Regular ;return #2 described as 'Initial Application ;return #2 of both #3 and  #4 ;return start date of #1 where #2 is equal to #5
['select', 'project', 'filter', 'filter', 'intersection', 'None']