question: public int [ ] [ ] f2e ( ) { int fDim = srcEndExclusive - srcStartInclusive ; int [ ] [ ] f2e = new int [ fDim ] [ ] ; for ( int i = srcStartInclusive ; i < srcEndExclusive ; ++ i ) { int localIdx = i - srcStartInclusive ; int [ ] f2eI = sentencePair . f2e ( i ) ; int tgtAlignDim = f2eI . length ; f2e [ localIdx ] = new int [ tgtAlignDim ] ; if ( tgtAlignDim > 0 ) { System . arraycopy ( f2eI , 0 , f2e [ localIdx ] , 0 , f2e [ localIdx ] . length ) ; for ( int j = 0 ; j < f2e [ localIdx ] . length ; ++ j ) { f2e [ localIdx ] [ j ] -= tgtStartInclusive ; } } } return f2e ; }
target:  Return the rule-internal source-target alignment grid.