Wikipedia entity: Slum
Topics: population; statistics; urbanization
Original sentence: In 1990, 46 percent of the urban population lived in slums; by 2000, the percentage had dropped to 39%; which further dropped to 32% by 2010.
Quantified sentence: In 1990, 46 percent of the urban population lived in slums; by 2000, the percentage had dropped to some; which further dropped to 32% by 2010. 
Quantifier: some
Percentage: 39%
Specificity: partially