Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: North Korean military chiefs have confirmed that they brutally executed the country's defence chief using an massive anti-aircraft gun at close range, a South Korean official revealed today. Seoul's National Intelligence Service told lawmakers that People's Armed Forces Minister Hyon Yong Chol was killed by anti-aircraft gunfire in May on charges of disloyalty to leader Kim Jong Un. It is understood that the 66-year-old defence chief had talked back to Kim during a gathering of top ranking officials, openly complained about the dictator's policies and fell asleep during meetings. The North's state media has since not mentioned Hyon or his disappearance.Intelligence officials have admitted the brutal killing of Hyon Yong CholDefence Minister was shot with an anti-aircraft gun from close range in MayHe was killed after falling asleep in meetings and talking back to leaderOfficials killed him with an ZPU-4 anti-aircraft gun in front of hundreds of bloodthirsty officials at a military camp near the capital 
 Question:_-Chol is the latest in a long line of officials and aides to fall victim to North Korea's trigger-happy president.

Hyon Yong Chol