Acknowlegment:
File Finder Service from JHU/APL (J. Vandegriff)
Time span:
Valid formats are YYYY-MM-dd,HH:mm and YYYY-DDD,HH:mm. (Times are optional.)
If the end date is omitted, it will default to one day after the start date.
Begin date: 1997-09-02, End date: 2009-10-20.
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