Table: cowboys_1999
Columns: week
date
tv_time
opponent
result

Question: Tell me the date with result of l 13–9
SQL: SELECT "date" FROM cowboys_1999 WHERE "result" = 'l 13–9'

Question: Tell me the total number of week for w 35–7
SQL: SELECT COUNT("week") FROM cowboys_1999 WHERE "result" = 'w 35–7'

Question: Tell me the average week for result of l 34–24
SQL: SELECT AVG("week") FROM cowboys_1999 WHERE "result" = 'l 34–24'