Table: broncos_1988_season
Columns: week
date
opponent
result
attendance

Question: What was the attendance on September 11, 1988?
SQL: SELECT AVG("attendance") FROM broncos_1988_season WHERE "date" = 'september 11, 1988'

Question: What was the attendance on week 1?
SQL: SELECT "attendance" FROM broncos_1988_season WHERE "week" = 1