question: public int [ ] [ ] e2f ( ) { int eDim = tgtEndExclusive - tgtStartInclusive ; int [ ] [ ] e2f = new int [ eDim ] [ ] ; for ( int i = tgtStartInclusive ; i < tgtEndExclusive ; ++ i ) { int localIdx = i - tgtStartInclusive ; int [ ] e2fI = sentencePair . e2f ( i ) ; int srcAlignDim = e2fI . length ; e2f [ localIdx ] = new int [ srcAlignDim ] ; if ( srcAlignDim > 0 ) { System . arraycopy ( e2fI , 0 , e2f [ localIdx ] , 0 , srcAlignDim ) ; for ( int j = 0 ; j < srcAlignDim ; ++ j ) { e2f [ localIdx ] [ j ] -= srcStartInclusive ; } } } return e2f ; }
target:  Return the rule-internal target-source alignment grid.