If you are a detective and the only clues you have for a
missing persons case are the words "red,"
"blue," and "green,"
these people could be a match. This is keyword searching.
Red + Blue + Green =
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If instead you knew your person had a red tie, blue shirt,
and a green beret, you have a better chance of finding
the right guy. This is field searching.
Tie=RED, Shirt=BLUE, Beret=GREEN =
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