Assertion: ballet | /r/HasProperty | based
Facets:
value: often
type: TEMPORAL
value: mostly
type: DEGREE
Source sentences:
text: The two chapters of the novel that the ballet is mostly based on were first adapted for the ballet in 1740 by Franz Hilverding in Vienna, Austria.
text: In addition, ballet is often the base from which to learn other forms of dance as well as sports, such as skating and gymnastics.