translation.en: Luckily, back in June of 1993, our unidentified visitor went away, but other families were so much less lucky, and that was the thought that motivated my research.
translation.zh: 很幸运的，1993年六月那次 门外的身份不明的到访者最终离开了， 但是其他的家庭远没有那么幸运， 也正是这个想法激发了我的研究。