Assertion: candle's color | /r/HasProperty | exposed to bright light
Facets:
value: for a lengthy period
type: TEMPORAL
Source sentences:
text: Foot-candles are also commonly used in the museum and gallery fields in the US, where lighting levels must be carefully controlled to conserve light-sensitive objects such as prints, photographs, and paintings, the colors of which fade when exposed to bright light for a lengthy period.