Assertion: bowfin's teeth | /r/MadeOf | tougher material
Facets:
value: much
type: DEGREE
Source sentences:
text: The teeth, however, are made from a much tougher material known as dentin, which is harder and denser even than bone.
text: The teeth, however, are made from a much tougher material known as dentin, which is harder and denser even than bone.