Q: Does "After a new wave of UN sanctions, on 11 March 2013, North Korea claimed that it had invalidated the 1953 armistice." provide a valid answer to "Why is North Korea insisting that the 1953 armistice was violated?"?
A: yes

Q: Does "The electrical properties of vacuum make electron microscopes and vacuum tubes possible, including cathode ray tubes." provide a valid answer to "What are two things made possible by the electrical properties of vacuum?"?
A: yes

Q: Does "One side views the war as a necessary part of the Containment policy, which allowed the enemy to choose the time and place of warfare." provide a valid answer to "The Vietnam War was an element of what US diplomatic policy?"?
A: yes

Q: Does "In 2008, Melbourne overtook Sydney with the amount of money that domestic tourists spent in the city, accounting for around $15.8 billion annually." provide a valid answer to "In 2008, Melbourne overtook what city with the amount of money that domestic tourists spent in the city?"?
A:
yes