CREATE TABLE table_4384 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" TEXT)

What was the attendance of the w 28-13 game?
SELECT "Attendance" FROM table_4384 WHERE "Result" = 'w 28-13'
SELECT "Attendance" FROM "table_4384" WHERE "Result" = 'w 28-13'