question: How much did Melbourne 's population increase within months of the gold rush ?
answer: three-quarters , from 25,000 to 40,000 inhabitants
turker_answer: Melbourne 's population increased three-quarters , from 25,000 to 40,000 inhabitants within months of the gold rush .
rule-based: Melbourne 's population increase three-quarters , from 25,000 to 40,000 inhabitants within months of the gold rush .