CREATE TABLE table_18937 ("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 try bonus for tries against is 70
SELECT "Try bonus" FROM table_18937 WHERE "Tries against" = '70'
SELECT "Try bonus" FROM "table_18937" WHERE "Tries against" = '70'