Assertion: known ballad | /r/HasProperty | brought to north america
Facets:
value: at the library of congress
type: LOCATION
value: in 2005
type: TEMPORAL
value: in her concert
type: TEMPORAL
Source sentences:
text: Margaret MacArthur, a folklorist and singer, performed some examples of the earliest known ballads brought to North America in her concert at the Library of Congress in 2005.