question: How much of the native population near Massachusetts was killed by smallpox in the epidemic between 1617 and 1619 ?
answer: 90 per cent
turker_answer: 90 % of the native population near Massachusetts was killed by smallpox in the epidemic between 1617 and 1619 .
rule-based: 90 per cent was killed by smallpox in the epidemic between 1617 and 1619 .