Table: afl_prelim_series_champs_3
Columns: season
premier
runner_up
score
venue
attendance
margin

Question: What is the average attendnace for seasons before 1986, a margin of 6, and a Score of 13.16 (94) – 13.10 (88)?
SQL: SELECT AVG("attendance") FROM afl_prelim_series_champs_3 WHERE "season" < 1986 AND "margin" = 6 AND "score" = '13.16 (94) – 13.10 (88)'

Question: When is the earliest season at waverley park, a Score of 15.12 (102) – 9.14 (68), and a Margin larger than 34?
SQL: SELECT MIN("season") FROM afl_prelim_series_champs_3 WHERE "venue" = 'waverley park' AND "score" = '15.12 (102) – 9.14 (68)' AND "margin" > 34

Question: How many seasons feature essendon, and a Score of 15.12 (102) – 9.14 (68)?
SQL: SELECT COUNT("season") FROM afl_prelim_series_champs_3 WHERE "premier" = 'essendon' AND "score" = '15.12 (102) – 9.14 (68)'