What is the salaray and name of the employee that is certified to fly the most planes?
return employees ;return planes #1 are certified to  fly ;return number of  #2 for each #1 ;return #1 where #3 is  the   highest ;return the   salaray of #4 ;return the   name of #4 ;return #5 ,  #6
['select', 'project', 'group', 'comparative', 'project', 'project', 'union']