Treaty of Maastricht
{'<entity_0>': 'Treaty of Maastricht', '<entity_1>': 'Belgium', '<entity_2>': '1843'}
[['Treaty of Maastricht', 'point in time', '1843'], ['Treaty of Maastricht', 'country', 'Belgium']]
The <entity_0>, signed in <entity_2> by <entity_1> and the Netherlands four years after the Treaty of London established Belgian independence, finally settled the border between the two countries.
['treaty']