Find the first name and office of the professor who is in the history department and has a Ph.D. degree.
return professors ;return #1 in the history department ;return #1 that  has  Ph.D. degree ;return first name of  both #2 and #3 ;return office of  both #2 and #3 ;return #4 ,   #5
['select', 'filter', 'filter', 'intersection', 'intersection', 'union']