Also known as ‘Internationale Kunstausstellung des Sonderbunds Westdeutscher Kunstfreunde und Künstler’, Special League of West-German Art Lovers and Artists., Sonderbund group
Established in 1909 in Germany, famous for spectacular exhibitions of modern art, in 1910, 1911 and especially 1912
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).