Find the ids and first names of the 3 teachers that have the most number of assessment notes?
return teachers ;return assessment notes of #1 ;return number of #2 for each #1 ;return #1 where #3 is  the highest ;return ids of #4 ;return first names of #4 ;return #5 , #6
['select', 'project', 'group', 'comparative', 'project', 'project', 'union']