Assertion: ballroom dance | /r/HasProperty | the waltz
Facets:
value: from the fox-trot
type: OTHER
value: from the 19th century
type: TEMPORAL
Source sentences:
text: Standard ballroom dances include the waltz and the polka from the 19th century and the fox-trot , the two-step , and the tango , among others, from the 20th century.