Which had the highest percentage of teachers in the obligatory, schools or private?
return schools ;return private ;return teachers in  the  obligatory of #1 ;return teachers in  the  obligatory of #2 ;return percentage of #3 ;return percentage of #4 ;return which is the  highest of #5 ,  #6
['select', 'select', 'project', 'project', 'project', 'project', 'comparison']