Context: Since 1934, the sale of Federal Duck Stamps has generated $670 million, and helped to purchase or lease 5,200,000 acres (8,100 sq mi; 21,000 km2) of habitat. The stamps serve as a license to hunt migratory birds, an entrance pass for all National Wildlife Refuge areas, and are also considered collectors items often purchased for aesthetic reasons outside of the hunting and birding communities. Although non-hunters buy a significant number of Duck Stamps, eighty-seven percent of their sales are contributed by hunters, which is logical, as hunters are required to purchase them. Distribution of funds is managed by the Migratory Bird Conservation Commission (MBCC).

Question: How much money has the sale of Federal Duck Stamps generated since 1934?
Answer: $670 million

Question: How many acres has the sale of Federal Duck Stamps helped to purchase or lease since 1934?
Answer: 5,200,000 acres

Question: What do the stamps give the purchaser a license to do?
Answer: hunt migratory birds

Question: Who accounts for eighty-seven percent of the sale of duck stamps?
Answer: hunters

Question: Who manages the distribution of the funds obtained by the sale of the stamps?
Answer: Migratory Bird Conservation Commission

Question: How much money has been generated due to the Duck Stamp act?
Answer: $670 million

Question: How much land has the Duck Stamp Act help purchase?
Answer: 5,200,000 acres

Question: What do the Duck Stamps serve as?
Answer: license to hunt migratory birds

Question: What percent of sales are contributed by hunters?
Answer: eighty-seven

Question: Who manages distribution of funds?
Answer: Migratory Bird Conservation Commission (MBCC)

Question: In what year was the MBCC created?
Answer: Unanswerable

Question: What is needed to enter MBCC areas?
Answer: Unanswerable

Question: What does the MBCC buy a significant number of?
Answer: Unanswerable

Question: What percentage of hunters belong to the MBCC?
Answer: Unanswerable

Question: What is required to work at the MBCC?
Answer: Unanswerable