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_16019 ( "Episode #" real, "Production code" real, "Title" text, "Directed by" text, "Written by" text, "Airdate" text )

### Question ###
what is the minimum production code with title 'foreign exchange problem / turn about

### Accurate SQL ###

SELECT MIN("Production code") FROM table_16019 WHERE "Title" = 'Foreign Exchange Problem / Turn About'