Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_29437 ( "No. in series" real, "No. in season" real, "Title" text, "Directed by" text, "Written by" text, "Original air date" text, "Production code" text, "U.S. viewers (millions)" text )

### Question ###
who directed the episode that elaine ko wrote?

### Accurate SQL ###

SELECT "Directed by" FROM table_29437 WHERE "Written by" = 'Elaine Ko'