Assertion: sword | /r/HasProperty | rare
Facets:
value: at first usable blades
type: OTHER
value: at the time
type: TEMPORAL
Source sentences:
text: Swords that had blades longer than 60 cm were rare at the time and first usable blades appeared in the late Bronze Age because bronze used before that was too soft to make a long blade that would not bend while used.
text: The sword was a work of rare beauty, accounts tell us, crafted by the inspired hands of the legendary Musumane, greatest of all Japanese swordsmiths.