### Question:
PalladianNer extends TrainableNamedEntityRecognizer implements ClassifyingTagger { static Annotation removeDateFragment(Annotation annotation) { String newValue = annotation.getValue(); int newOffset = annotation.getStartPosition(); for (String dateFragment : RegExp.DATE_FRAGMENTS) { String regExp = "(?:" + dateFragment + ")\\.?"; String beginRegExp = "^" + regExp + " "; String endRegExp = " " + regExp + "$"; int textLength = newValue.length(); if (StringHelper.countRegexMatches(newValue, beginRegExp) > 0) { newValue = newValue.replaceAll(beginRegExp, " ").trim(); newOffset += textLength - newValue.length(); } if (StringHelper.countRegexMatches(newValue, endRegExp) > 0) { newValue = newValue.replaceAll(endRegExp, " ").trim(); } } if (annotation.getValue().equals(newValue)) { return null; } LOGGER.debug("Removed date fragment from '{}' gives '{}'", annotation.getValue(), newValue); return new ImmutableAnnotation(newOffset, newValue, annotation.getTag()); } PalladianNer(PalladianNerTrainingSettings trainingSettings);  PalladianNer(String modelFilePath); @Override String getModelFileEnding(); @Override boolean setsModelFileEndingAutomatically(); @Override boolean loadModel(String configModelFilePath); @Override boolean train(String trainingFilePath, String modelFilePath); void train(String trainingFilePath, List<Annotation> annotations, String modelFilePath); void setEntityDictionary(String filePath); void train(List<Annotation> annotations, String modelFilePath); @Override List<ClassifiedAnnotation> getAnnotations(String inputText); PalladianNerModel getModel(); @Override String getName(); PalladianNerTaggingSettings getTaggingSettings();  }### Answer:
@Test public void testRemoveDateFragment() { Annotation result = PalladianNer.removeDateFragment(new ImmutableAnnotation(10, "June John Hiatt", StringUtils.EMPTY)); assertEquals(15, result.getStartPosition()); assertEquals("John Hiatt", result.getValue()); result = PalladianNer.removeDateFragment(new ImmutableAnnotation(0, "John Hiatt June", StringUtils.EMPTY)); assertEquals(0, result.getStartPosition()); assertEquals("John Hiatt", result.getValue()); result = PalladianNer.removeDateFragment(new ImmutableAnnotation(0, "Apr. John Hiatt", StringUtils.EMPTY)); assertEquals(5, result.getStartPosition()); assertEquals("John Hiatt", result.getValue()); result = PalladianNer.removeDateFragment(new ImmutableAnnotation(0, "John Hiatt Apr.", StringUtils.EMPTY)); assertEquals(0, result.getStartPosition()); assertEquals("John Hiatt", result.getValue()); }