CREATE TABLE table_21843 ("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)

Name the points aginst when drawn is 1 and points is 51
SELECT "Points against" FROM table_21843 WHERE "Drawn" = '1' AND "Points" = '51'
SELECT "Points against" FROM "table_21843" WHERE "Drawn" = '1' AND "Points" = '51'