Assertion: malaria | /r/AtLocation | parts of the united states
Facets:
value: naturally
type: MANNER
value: until the mid 20th century
type: TEMPORAL
Source sentences:
text: Although malaria occurred naturally in parts of the United States, including California, until the mid 20th Century, today over 99 percent of the malaria cases diagnosed in U.S. residents are acquired during travel to other countries.