QUES: Q: Why was South Korea important to the US?
A: The essential point... is that the American response to the North Korean attack stemmed from considerations of US policy toward Japan."
Does the answer answer the question?

ANS: yes

QUES: Q: How many Russian immigrants arrived in Israel?
A: Due to mass immigration from the former Soviet Union and Ethiopia (some 130,000 Ethiopian Jews live in Israel), Russian and Amharic are widely spoken.
Does the answer answer the question?

ANS: no

QUES: Q: How many records of sunspots are there?
A: Astronomy: Astronomical observations from China constitute the longest continuous sequence from any civilisation and include records of sunspots (112 records from 364 BC), supernovas (1054), lunar and solar eclipses.
Does the answer answer the question?

ANS: yes

QUES: Q: How will solar energy increase energy security?
A: It will increase countries' energy security through reliance on an indigenous, inexhaustible and mostly import-independent resource, enhance sustainability, reduce pollution, lower the costs of mitigating global warming, and keep fossil fuel prices lower than otherwise.
Does the answer answer the question?

ANS:
yes