Assertion: bismuth | /r/HasProperty | known in 15th and 16th centuries
Facets:
Source sentences:
text: Bismuth was known in the 15th and 16th centuries but was long considered to be a variety of tin, lead, or antimony.
text: Bismuth was known in the 15th and 16th centuries but was long considered to be a variety of tin, lead, or antimony.