SELECT avg(T1.Age) FROM STUDENT AS T1 JOIN VOTING_RECORD AS T2 ON T1.StuID  =  SECRETARY_Vote WHERE T1.city_code  =  "NYC" AND T2.Election_Cycle  =  "Spring"
Find the average age of students who live in the city with code "NYC" and have secretary votes in the spring election cycle.
[Schema (values) (types)]: | voter_2 |  Student : stuid (text) , lname (number) , fname (text) , age (text) , sex (number) , major (text) , advisor (number) , city_code (number) | Voting_record : stuid (text) , registration_date (number) , election_cycle (text) , president_vote (text) , vice_president_vote (number) , secretary_vote (text) , treasurer_vote (number) , class_president_vote (number) , class_senator_vote (text);