Assertion: breakwater | /r/HasProperty | built of boulder
Facets:
value: generally
type: DEGREE
Source sentences:
text: Seawalls are structures built of concrete, wood, steel or boulders that run parallel to the beach at the land/water interface.
text: Seawalls protect inland residential, commercial and industrial properties and roads, so they're generally built using reinforced concrete, boulders, large biodegradable sandbags, gabions, steel, and other materials.