for (int i = 0; i < posTags.size(); i++) npChunkTags.add("O");
ChunkedSentence sent = new ChunkedSentence(tokens, posTags, npChunkTags);
ChunkedExtraction extr = new ChunkedExtraction(sent, new Range(0, posTags.size()));
NormalizedField normField = normalizer.normalizeField(extr);
String resultStr = normField.toString();
assertEquals(expectedStr, resultStr);
}