Assertion: gypsum's product | /r/HasProperty | produced for example
Facets:
value: often
type: TEMPORAL
value: by using foaming agents
type: MANNER
Source sentences:
text: For example, lower density gypsum-containing products are often produced by using foaming agents to create aqueous bubbles in calcined gypsum slurries (flowable aqueous mixtures) that yield corresponding permanent voids in the product when the set gypsum forms.