Table: viking_91
Columns: week
date
opponent
result
attendance

Question: When did the w 20-19 happen?
SQL: SELECT "date" FROM viking_91 WHERE "result" = 'w 20-19'

Question: What was the attendance of the w 28-13 game?
SQL: SELECT "attendance" FROM viking_91 WHERE "result" = 'w 28-13'