Assertion: golf ball's core | /r/MadeOf | synthetic rubber
Facets:
value: generally
type: MANNER
value: with a hard covering
type: OTHER
Source sentences:
text: Today’s core is generally made from synthetic rubber -- which may be mixed with bits of metal, such as tungsten or titanium -- or a plastic-like material such as acrylate.
text: The two-piece modern ball is formed by surrounding a spherical molded core made of rubber or synthetic rubber with a hard covering.
text: Today’s core is generally made from synthetic rubber -- which may be mixed with bits of metal, such as tungsten or titanium -- or a plastic-like material such as acrylate.