CREATE TABLE table_204_918 (id NUMBER, "week" NUMBER, "date" CLOB, "opponent" CLOB, "result" CLOB, "record" CLOB, "attendance" NUMBER, "bye" CLOB)

how many points did the ravens win by in week 13 ?
SELECT "result" - "result" FROM table_204_918 WHERE "week" = 13
SELECT "result" - "result" FROM "table_204_918" WHERE "week" = 13