Assertion: custom union | /r/HasProperty | established by belgium
Facets:
Source sentences:
text: The customs union established by Switzerland and the Principality of Liechtenstein in 1924; the customs union established by Belgium, the Netherlands, and Luxembourg in 1948; the customs union established by the countries of the European Economic Community in 1958; the European Free Trade Association once established in 1960; and the Economic Community of Central African States established in 1964.