Problem: Does "None, however, proved compelling enough to seriously challenge the established order until the arrival of foreign powers." answer the question "Strict class hierarchy was established by who?"

A: no

Problem: Does "One of the most important developments that the Enlightenment era brought to the discipline of science was its popularization." answer the question "Who wrote the celebrated Philosophiae Naturalis Principia Mathematica?"

A: no

Problem: Does "The spectacular Vikos Gorge, part of the Vikos-Aoos National Park in the Pindus range, is listed by the Guinness book of World Records as the deepest gorge in the world." answer the question "Where does the Pindus mountain range end?"

A:
no