CREATE TABLE table_19117 ("Club" CLOB, "Played" CLOB, "Won" CLOB, "Drawn" CLOB, "Lost" CLOB, "Points for" CLOB, "Points against" CLOB, "Tries for" CLOB, "Tries against" CLOB, "Try bonus" CLOB, "Losing bonus" CLOB, "Points" CLOB)

what's the won with points for being 643
SELECT "Won" FROM table_19117 WHERE "Points for" = '643'
SELECT "Won" FROM "table_19117" WHERE "Points for" = '643'