question: public Sentence ( String sentence , String tag ) { tokens = sentence . split ( "\\s+" ) ; lemmas = tokens ; tags = tag . split ( "\\s+" ) ; if ( tokens . length != tags . length ) { throw new IllegalArgumentException ( "Lengths do not match!" ) ; } position = new int [ tokens . length ] ; for ( int i = 0 ; i < tokens . length ; i ++ ) { position [ i ] = i ; } }
target:  Constructs a Sentence object from a plain space-delimited sentence, e.g.,  "Tom likes Jerry ." 