CREATE TABLE table_31033 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB)

Who are the writers of the episode with production code IP02009?
SELECT "Written by" FROM table_31033 WHERE "Production code" = 'IP02009'
SELECT "Written by" FROM "table_31033" WHERE "Production code" = 'IP02009'