Complex sentence: National Association for the Rescue of Japanese Kidnapped by North Korea is owned by Yokota family and along families of Japanese victims by North Korea who campigan for return their loved ones in North Korea between 1970s and 1980s.
Split into simpler sentences: National Association for the Rescue of Japanese Kidnapped by North Korea is owned by Yokota family. They help the families of Japanese victims kidnapped by North Korea, who campaign for the return of their loved ones in North Korea between 1970s and 1980s.