Find the average age of students who live in the city with code "NYC" and have secretary votes in the spring election cycle.
return students ;return cities of #1 ;return codes of #2 ;return #1 where #3 is NYC ;return secretary votes of #1 ;return #5 in  the  spring election cycle ;return number of  #6 for each #1 ;return #1 where #7 is higher than zero ;return #1 in  both #4 and  #8 ;return ages of #9 ;return average of #10
['select', 'project', 'project', 'comparative', 'project', 'filter', 'group', 'comparative', 'intersection', 'project', 'aggregate']