Assertion: urea | /r/HasProperty | raw material
Facets:
Source sentences:
text: Urea is a raw material for the manufacture of two main classes of materials: urea-formaldehyde resins and urea-melamine-formaldehyde used in marine plywood.
text: Urea is a raw material used in the manufacture of many important chemicals, such as:
text: Urea is a raw material used in the manufacture of many chemicals, such as various plastics, urea -formaldehyde resins and adhesives.