Problem: Does "The continuing population loss has led some to suggest that the current use of the drier parts of the Great Plains is not sustainable, and there has been a proposal - the "Buffalo Commons" - to return approximately 139,000 square miles (360,000 km2) of these drier parts to native prairie land." answer the question "how much of the population have the rural plains lost since 1920?"

A: no

Problem: Does "While she almost exclusively releases English songs, Beyonce recorded several Spanish songs for Irreemplazable (re-recordings of songs from B'Day for a Spanish-language audience), and the re-release of B'Day." answer the question "What other language has she sung?"

A: yes

Problem: Does "Albert insisted the Great Exhibition surplus should be used as a home for culture and education for everyone." answer the question "How much of a surplus did The Great Ehibition raise?"

A:
no