Assertion: trench fever | /r/HasProperty | unusual disease
Facets:
Source sentences:
text: Trench fever is an unusual disease because it was first discovered in 1915 and reached epidemic proportions on the Western Front, but then suddenly disappeared in 1918 when the war ended.
text: Trench Fever is an unusual disease in that it was first discovered in 1915 and disappeared in 1918 when the war ended.