Find the names and average salaries of all departments whose average salary is greater than 42000.
return departments ;return average salaries of  #1 ;return #1 where  #2 is  greater than  42000 ;return names of  #3 ;return average salaries of  #3 ;return #4 ,   #5
['select', 'project', 'comparative', 'project', 'project', 'union']