Table: formula_ford_champs
Columns: season
champion
constructor
teams_champion
secondary_class
nations_cup
winter_series_champion

Question: Which Nations Cup has a Winter Series Champion of Andrew Bentley?
SQL: SELECT "nations_cup" FROM formula_ford_champs WHERE "winter_series_champion" = 'andrew bentley'

Question: What secondary class of Winter Series champion Andrew Bentley?
SQL: SELECT "secondary_class" FROM formula_ford_champs WHERE "winter_series_champion" = 'andrew bentley'

Question: What season has the champion of Nicolas Kiesa?
SQL: SELECT "season" FROM formula_ford_champs WHERE "champion" = 'nicolas kiesa'

Question: What team's champion has a secondary class of Matt Rao for a Winter Series Champion of Not Held?
SQL: SELECT "teams_champion" FROM formula_ford_champs WHERE "winter_series_champion" = 'not held' AND "secondary_class" = 'matt rao'

Question: Who is the Teams' Champion for the Season of 1989?
SQL: SELECT "teams_champion" FROM formula_ford_champs WHERE "season" = '1989'