question: How many acres has the sale of Federal Duck Stamps helped to purchase or lease since 1934 ?
answer: 5,200,000 acres
turker_answer: The sale of Federal Duck Stamps helped to purchase or lease 5,200,000 acres since 1934 .
rule-based: 5,200,000 acres has the sale of Federal Duck Stamps helped to purchase or lease since 1934 .