Assertion: ball gown's skirt | /r/MadeOf | front piece
Facets:
value: after about 1806
type: TEMPORAL
Source sentences:
text: skirts: after about 1806, skirts are made of a front piece that is rectangular, a wide back piece that is rectangular, and then side gores that are triangular.
text: after about 1806, skirts are made of a front piece that is rectangular, a wide back piece that is rectangular, and then side gores that are triangular.