List the full name (first and last name), and salary for those employees who earn below 6000.
return employees ;return salary of  #1 ;return #1 where #2 is  less than 6000 ;return the  first name  of  #3 ;return the  last name  of  #3 ;return #4 ,  #5
['select', 'project', 'comparative', 'project', 'project', 'union']