CREATE TABLE table_204_395 (id NUMBER, "year" NUMBER, "competition" CLOB, "venue" CLOB, "position" CLOB, "notes" CLOB)

how long was the relay at the 1997 world championships that ken harden ran
SELECT "notes" FROM table_204_395 WHERE "year" = 1997 AND "competition" = 'world championships'
SELECT "notes" FROM "table_204_395" WHERE "competition" = 'world championships' AND "year" = 1997