The first group were females who had witnessed a predator attack and lost someone in that attack, and the second group were females who had witnessed an attack but had not lost someone.
첫 번째 그룹은  포식자의 공격을 목격하고 그 공격으로 인해 누군가를 잃은 암컷 무리였고 두 번째 그룹은  포식자의 공격을 목격했지만 아무도 죽지 않은 암컷의 무리였어요.