Problem: Does "However, a major breakthrough came in December 2014, when it was reported that Nigeria hadn't recorded a polio case in 6 months, and on its way to be declared Polio free." answer the question "When had Nigeria not had a reported polio case in 6 months for the first time?"

A: yes

Problem: Does "Monophonic chant, also called plainsong or Gregorian chant, was the dominant form until about 1100." answer the question "When did Monophonic chant stop being the dominant form?"

A: yes

Problem: Does "Hayek's work on the macroeconomic subjects of central planning, trade cycle theory, the division of knowledge, and entrepreneurial adaptation especially, differ greatly from the opinions of macroeconomic "Marshallian" economists in the tradition of John Maynard Keynes and the microeconomic "Walrasian" economists in the tradition of Abba Lerner." answer the question "In what economic field of study does Hayek's views differ from those in macroeconomics?"

A:
no