Find the names of either colleges in LA with greater than 15000 size or in state AZ with less than 13000 enrollment.
return colleges ;return #1 that  are  in LA ;return #1 that  are  in AZ ;return enrollment of  #2 ;return enrollment of  #3 ;return #2 where  #4 is  greater than  15000 ;return #3 where  #5 is  less than  13000 ;return #6 or  #7
['select', 'filter', 'filter', 'project', 'project', 'comparative', 'comparative', 'union']