CREATE TABLE table_48897 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Attendance" CLOB)

Which Week has a Result of l 21-19?
SELECT COUNT("Week") FROM table_48897 WHERE "Result" = 'l 21-19'
SELECT COUNT("Week") FROM "table_48897" WHERE "Result" = 'l 21-19'