Find the id and name of the staff who has been assigned for the shortest period.
return staff ;return #1 who  are  assigned ;return period of  #2 ;return #2 where  #3 is  shortest ;return id of  #4 ;return name of  #4 ;return #5 ,   #6
['select', 'filter', 'project', 'superlative', 'project', 'project', 'union']