Assertion: zither | /r/RelatedTo | korean kayagŭm
Facets:
value: on the central southern coast
type: LOCATION
value: by at least the 6th century
type: TEMPORAL
Source sentences:
text: The zither is of special interest, for it is related to the Korean kayagŭm that appeared in the Kaya kingdom (on the central southern coast of what is now South Korea) by at least the 6th century.