| http://www.w3.org/ns/prov#value | - The impression of descent-- increasing volume, i.e. sound from an incoming source-- was fast enough for my friend, who is an experienced pilot, to say that it sounded like it was in trouble.I went outside and spotted the craft to the north-northwest of us, at an apparent altitude of about four thousand feet, about 1/3 mile to the north of us, moving almost due east.
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