Table: football_stats
Columns: pos
member_association
points_total_500
clubs
group_stage
play_off
afc_cup

Question: How many times has the playoff been 1 in the contest for the afc cup?
SQL: SELECT COUNT("afc_cup") FROM football_stats WHERE "play_off" = 1

Question: How many times has the points total for the afc cup competion been 289?
SQL: SELECT COUNT("afc_cup") FROM football_stats WHERE "points_total_500" = 289

Question: When the group stage has been 4 what is the largest playoff?
SQL: SELECT MAX("play_off") FROM football_stats WHERE "group_stage" = 4