Premise: Austria . After the collapse of the Habsburg ( Austro-Hungarian ) Empire in 1918 at the end of World War I , Austria adopted and used the name the Republic of German-Austria ( Deutschösterreich ) , later changed to Österreich , in an attempt at union with Germany , but this was forbidden under the Treaty of Saint-Germain-en-Laye ( 1919 ) .
Hypothesis: Austria was ruled by the House of Habsburg.
Label: ENTAILMENT