Table: falcons_1979_season
Columns: week
date
opponent
result
attendance

Question: What is the week with w 31-21 result?
SQL: SELECT "week" FROM falcons_1979_season WHERE "result" = 'w 31-21'

Question: In week 7, what was the average attendance?
SQL: SELECT AVG("attendance") FROM falcons_1979_season WHERE "week" = 7

Question: Who was the opponent on september 10, 1979?
SQL: SELECT "opponent" FROM falcons_1979_season WHERE "date" = 'september 10, 1979'