Table: t_2001_buffalo_bills_season
Columns: week
date
opponent
result
record
game_site
attendance

Question: Who is the opponent on October 28, 2001?
SQL: SELECT "opponent" FROM t_2001_buffalo_bills_season WHERE "date" = 'october 28, 2001'

Question: What was the lowest week at Ralph Wilson Stadium on October 7, 2001?
SQL: SELECT MIN("week") FROM t_2001_buffalo_bills_season WHERE "game_site" = 'ralph wilson stadium' AND "date" = 'october 7, 2001'