CREATE TABLE table_47998 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" TEXT)

Which week has a result L 56-3?
SELECT AVG("Week") FROM table_47998 WHERE "Result" = 'l 56-3'
SELECT AVG("Week") FROM "table_47998" WHERE "Result" = 'l 56-3'