Assertion: enamel | /r/HasProperty | worn over time
Facets:
value: by food
type: CAUSE
value: by drink
type: MANNER
Source sentences:
text: It should feel firm and strong but can also be worn away over time due to eating highly acidic foods and drinking acidic beverages.
text: It can be worn away over time by food, drink and a variety of environmental and hygienic factors.