Table: chefs_raiders_games
Columns: year
date
winner
result
loser
location

Question: Who was the winner of the game in 1999 with Kansas City Chiefs as the loser?
SQL: SELECT "winner" FROM chefs_raiders_games WHERE "year" = 1999 AND "loser" = 'kansas city chiefs'

Question: What is the average year of the games with the date December 26?
SQL: SELECT AVG("year") FROM chefs_raiders_games WHERE "date" = 'december 26'