Assertion: bell tower's bell | /r/HasAspect | poor tone
Facets:
value: due to both their variable alloy composition
type: CAUSE
value: due to a lack of understanding
type: CAUSE
Source sentences:
text: These early bells had poor tone, due to both their variable alloy composition and a lack of understanding of producing the correct shape for a harmonic tone; but over time the bell-shape was improved.