I want to know the answer to the following question:
In which French city was the surrender made official?
All the background I'm provided with is that "Although public opinion in Paris was strongly against any form of surrender or concession to the Prussians, the Government realised that it could not hold the city for much longer, and that Gambetta's provincial armies would probably never break through to relieve Paris.". Is that enough to answer the question?
Answer: no