Assertion: union | /r/HasProperty | formed after the end of world war i
Facets:
value: officially
type: MANNER
Source sentences:
text: Although the Union was officially formed eight months after the end of World War I, international collaboration in astronomy had been strong in the pre-war era (e.g., the Astronomische Gesellschaft Katalog projects since 1868, the Astrographic Catalogue since 1887, and the International Union for Solar research since 1904).