Assertion: rapier's blade | /r/HasProperty | suitable
Facets:
value: for a leaf shape
type: CAUSE
Source sentences:
text: The design has most likely been in existence since the appearance of the first swords, blades in bronze and iron are suitable for a leaf shape due to the softness of the metals in comparison to steel.  
text: Blades in bronze and iron are suitable for a leaf shape due to the softness of the metals in comparison to steel.