Assertion: notre dame | /r/HasProperty | one of the first buildings
Facets:
value: to put flying buttresses
type: PURPOSE
Source sentences:
text: Note that Notre-Dame was one of the first buildings to make use of flying buttresses—exterior supports that spread the weight of the building and roof.
text: They help support the walls, and Notre Dame was one of the first buildings in the world to put flying buttresses into place.