Specific output delivered by assistant API model 3.5 turbo 1106

There is little more to mention. It always fails. It does return the correct city, but not in the defined way between “[” and “]”. These brackets are the starting point for other plug-ins on my website to fetch the word/city/island etc. It’s just a matter of displaying the content in the correct format and HOW I SAY IT in the prompt. Where are all the SPECIALIST FROM OpenAI???