Show the countries that have both perpetrators with injures more than 50 and perpetrators with injures smaller than 20.
SELECT Country FROM perpetrator WHERE Injured  >  50 INTERSECT SELECT Country FROM perpetrator WHERE Injured  <  20
Her iki fail olan ülkelere 50'den fazla yaralanan ülkeleri ve 20'den küçük yaralanmaları olan failleri gösterin.