Find all the films longer than 100 minutes, or rated PG, except those who cost more than 200 for replacement. List the titles.
return films ;return #1 that are longer than 100 minutes ;return #1 that are rated PG ;return #2 ,  #3 ;return cost of replacement of  #4 ;return #4 where #5 is higher than 200 ;return #4 besides  #6 ;return titles of #7
['select', 'filter', 'filter', 'union', 'project', 'comparative', 'discard', 'project']