Table: miss_teen_usa_1986
Columns: state
preliminaries
interview
swimsuit
evening_gown
average

Question:  what's the preliminaries where evening gown is 8.988
SQL: SELECT "preliminaries" FROM miss_teen_usa_1986 WHERE "evening_gown" = '8.988'

Question:  what's the swimsuit where average is 8.670
SQL: SELECT "swimsuit" FROM miss_teen_usa_1986 WHERE "average" = '8.670'

Question:  what's the evening gown where preliminaries is 8.977
SQL: SELECT "evening_gown" FROM miss_teen_usa_1986 WHERE "preliminaries" = '8.977'

Question:  what's the preliminaries where state is south dakota
SQL: SELECT "preliminaries" FROM miss_teen_usa_1986 WHERE "state" = 'South Dakota'

Question:  what's the evening gown where state is south dakota
SQL: SELECT "evening_gown" FROM miss_teen_usa_1986 WHERE "state" = 'South Dakota'

Question: what is the total number of average where evening gown is 8.988
SQL: SELECT COUNT("average") FROM miss_teen_usa_1986 WHERE "evening_gown" = '8.988'