Assertion: today boomerang | /r/MadeOf | fiberglas
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Today boomerangs used for sports are often made of plywood or fiberglass.
text: Today boomerangs are often made of high-grade plywood and fibreglass.
text: Today boomerangs are often made of high-grade plywood and fiberglass and come in many shapes and sizes, including nontraditional types with three or four blades.