user: Question: What opponent has a week less than 16, with September 7, 2008 as the date?
Columns: ['Week', 'Date', 'Time ( PT )', 'Opponent', 'Result', 'Record', 'Game site']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 7, 2008', '1:15 p.m.', 'Arizona Cardinals', 'L 13-23', '0-1', 'Candlestick Park']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Week" < 16.0 AND "Date" = 'September 7, 2008';