Wikipedia entity: Sword
Topics: cultural artifact; material properties; metalworking
Original sentence: Also unique for Chinese bronzes is the consistent use of high tin bronze (17-21% tin) which is very hard and breaks if stressed too far, whereas other cultures preferred lower tin bronze (usually 10%), which bends if stressed too far.
Quantified sentence: Also unique for Chinese bronzes is the consistent use of bronze (with moderate tin) which is very hard and breaks if stressed too far, whereas other cultures preferred lower tin bronze (usually 10%), which bends if stressed too far.
Quantifier: moderate
Percentage: 17%-21%
Specificity: partially