QUES: Q: Who ruled as the the Hongwu Emperor?
A: Zhu Yuanzhang then established the Ming dynasty, ruling as the Hongwu Emperor (r. 13681398).
Does the answer answer the question?

ANS: yes

QUES: Q: What three things does the tax system depend on?
A: It has one of the highest consumption taxes in the world and taxes all imports in lieu of an income tax system.
Does the answer answer the question?

ANS: no

QUES: Q: In which census are these numbers coming from?
A: Detroit is the center of a three-county urban area (population 3,734,090, area of 1,337 square miles (3,460 km2), a 2010 United States Census) six-county metropolitan statistical area (2010 Census population of 4,296,250, area of 3,913 square miles [10,130 km2]), and a nine-county Combined Statistical Area (2010 Census population of 5,218,852, area of 5,814 square miles [15,060 km2]).
Does the answer answer the question?

ANS: yes

QUES: Q: What compound made the diphtheria vaccine safer to use?
A: In 1923 parallel efforts by Gaston Ramon at the Pasteur Institute and Alexander Glenny at the Wellcome Research Laboratories (later part of GlaxoSmithKline) led to the discovery that a safer vaccine could be produced by treating diphtheria toxin with formaldehyde.
Does the answer answer the question?

ANS:
yes