Assertion: fresco | /r/MadeOf | piece
Facets:
value: usually
type: TEMPORAL
value: by piece
type: MANNER
Source sentences:
text: For this reason, frescoes are usually made piece by piece, one little section at the time: this way, the risk of plaster drying while the artist still works on the painting is minimized, and time can be spent to focus on details and color nuances.