CREATE TABLE table_204_450 (id NUMBER, "year" NUMBER, "competition" CLOB, "venue" CLOB, "position" CLOB, "event" CLOB, "notes" CLOB)

what was the name of the competition listed before the boston marathon in 1984 ?
SELECT "competition" FROM table_204_450 WHERE id = (SELECT id FROM table_204_450 WHERE "competition" = 'boston marathon') - 1
SELECT "competition" FROM "table_204_450" WHERE "id" = (SELECT "id" FROM "table_204_450" WHERE "competition" = 'boston marathon') - 1