Which week was the game against the San Diego Chargers?
CREATE TABLE table_name_91 (week VARCHAR, opponent VARCHAR)
SELECT week FROM table_name_91 WHERE opponent = "san diego chargers"
### Context: CREATE TABLE table_name_91 (week VARCHAR, opponent VARCHAR) ### Question: Which week was the game against the San Diego Chargers? ### Answer: SELECT week FROM table_name_91 WHERE opponent = "san diego chargers"