What are the names and average salaries for departments with average salary higher than 42000?
return departments ;return salaries of #1 ;return the  average  of #2 for each #1 ;return #1 where #3 is  higher than 42000 ;return the  names of #4 ;return salaries of #4 ;return the  average  of #6 for each #4 ;return #5 ,  #7
['select', 'project', 'group', 'comparative', 'project', 'project', 'group', 'union']