question: What 's the minimum number of second-line medication classes your TB would have to resist to make it count as `` extensively drug-resistant '' ?
answer: three
turker_answer: The minimum number of second-line medication classes your TB would have to resist to make it count as `` extensively drug-resistant '' is three .
rule-based: The minimum number of second-line medication classes your TB would have to resist to make it count as `` extensively drug-resistant 's three '' .