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 FUNCTION: extract(<string>, <first>, <length>[,<idelim>[,<odelim>]])
 Extract returns a string of length words, starting with the first
 word.  Unlike letters, the first word in a string is number 1,
 instead of 0.
 The input delimiter for <string> is <idelim>.  The output list
 delimiter is <odelim>.  <idelim> defaults to a space.
   > say extract(This is a really neat example, 4, 2)
   You say, "really neat"
   > say extract(Another@funky@test@for@extract, 3, 3, @)
   You say, "test@for@extract"
 Related Topics: index(), insert(), ldelete(), replace().