Assertion: fountain pen's nib | /r/MadeOf | gold
Facets:
Source sentences:
text: The nib of a fountain pen can be made from gold or stainless steel, and the series of tubes that send the ink to it are called the feed.
text: The nib of a fountain pen can be made from gold or stainless steel, and the series of tubes that send the ink to it are called the feed.