HOW MANY PEOPLE HAS KILLED AT SOUTH KOREA ?
select killed from perpetrator where country = "South Korea"
WHAT IS THE NAME OF THE PERPETRATOR WITH THE BIGGEST WEIGHT ?
select t1.name from people as t1 join perpetrator as t2 on t1.people_id = t2.people_id order by t1.weight desc limit 1
WHERE IS THE LOCATION OF EVENTS IN JAPAN ?
select location from perpetrator where country = "Japan"