Assertion: elf's appearance | /r/CapableOf | become prominent
Facets:
value: in the united states
type: LOCATION
value: in the 19th century
type: TEMPORAL
Source sentences:
text: The appearance of elves in Christmas narratives became prominent in the United States in the 19th century.
text: The appearance of elves in Christmas narratives became prominent in the United States in the 19th century.