score:6
This is a good example why an artificial intelligence, such as ChatGPT, can come to invalid conclusions.
The Neutral Moresnet area was around 1.5 km at its widest point and 5 km long, starting at the Dutch border with (in 1867) Prussia and Belgium.
Founded on the 23 December 1865, the Latin Monetary Union the initial members were France, Belgium, Italy, and Switzerland.
The International Monetary Conference of 1867 took place in Paris in April (where Greece joined the Latin Monetary Union soon after).
The Netherlands, Prussia and Luxembourg (both of which belonged to the German Customs Union) did not belong to the Latin Monetary Union.
Luxembourg, in 1867, was still ruled by the Netherlands.
The Luxembourg Crisis came to a head on the 23rd of March 1867, which lead to the Treaty of London (11th of May 1867) bringing Luxembourg full independence and neutrality.
So where is the connection between the Latin Monetary Union, the Luxembourg crises and the area of Neutral Moresnet you may ask?
So ChatGPT has gotten this wrong on many counts, probably due to many events occuring during the same time period (March, April, May 1867).