Wikipedia entity: COVID-19
Topics: medical study; mortality rate; children
Original sentence: Four of the 582 children (0.7%) in the European study died, but the actual mortality rate may be "substantially lower" since milder cases that did not seek medical help were not included in the study.
Quantified sentence: A few children (four of the 582) in the European study died, but the actual mortality rate may be "substantially lower" since milder cases that did not seek medical help were not included in the study.
Quantifier: few
Percentage: 0.70%
Specificity: fully