Wikipedia entity: Salmon
Topics: animal; salmon; mortality; reproduction
Original sentence: However, even in those species of salmon that may survive to spawn more than once (iteroparity), postspawning mortality is quite high (perhaps as high as 40 to 50%).
Quantified sentence: However, even in those species of salmon that may survive to spawn more than once (iteroparity), postspawning mortality is quite large.
Quantifier: large
Percentage: 40%-50%
Specificity: unable