CREATE TABLE table_40638 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" TEXT)

Which Attendance has a Result of l 29 23?
SELECT "Attendance" FROM table_40638 WHERE "Result" = 'l 29–23'
SELECT "Attendance" FROM "table_40638" WHERE "Result" = 'l 29–23'