Problem: Does "Studies by Nathaniel Kleitman in 1938 and by Derk-Jan Dijk and Charles Czeisler in the 1990s put human subjects on enforced 28-hour sleepwake cycles, in constant dim light and with other time cues suppressed, for over a month." answer the question "When in the cycle do wake-sleep cycles break off from the circadian period?"

A: no

Problem: Does "In 2015 the rate of pub closures came under the scrutiny of Parliament in the UK, with a promise of legislation to improve relations between owners and tenants." answer the question "What did Parliament promise to pass as a result of increased pub closures?"

A: yes

Problem: Does "It has been estimated that from the 10th to 19th centuries some 6,000 to 7,000 slaves were transported north each year." answer the question "What is the estimated number of slaves that were transported each year?"

A:
yes