根据国家档案局星期日公布的文件，这个事件只是 1987 年和 1993 年间由调查人员报告的大约 1，200 个目击事件中的一个。
The incident is just one of around 1,200 sightings recorded by investigators between 1987 and 1993, according to the files released by the National Archives on Sunday.
根据国家档案局星期日公布的文件，这个事件只是 1987 年和 1993 年间由调查人员报告的大约 1，200 个目击事件中的一个。
The incident is just one of around 1,200 sightings recorded by investigators between 1987 and 1993, according to the files released by the National Archives on Sunday.
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