For each position, what is the maximum number of  hours for students who spent more than 1000 hours training?
return students ;return positions of #1 ;return hours  spent training of #1 ;return #1 where #3 is higher than 1000 ;return hours  spent training of #4 ;return the  highest of #5 for each  #2
['select', 'project', 'project', 'comparative', 'project', 'group']