Assertion: iron | /r/HasProperty | useful
Facets:
value: in a basic forms like fe2o3
type: OTHER
value: in trouble spots
type: LOCATION
Source sentences:
text: They are typically used from the fairway or rough, but are also useful in trouble spots such as when "punching out" from underneath a stand of trees.
text: Iron can be useful in a basic forms like Fe2O3 (Ferric Oxide).