try {
final PrintWriter guessPw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePrefix + ".kworst.guess"),"UTF-8")));
final PrintWriter goldPw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePrefix + ".kworst.gold"),"UTF-8")));
final ConstituentFactory cFact = new LabeledScoredConstituentFactory();
final PrintWriter guessDepPw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePrefix + ".kworst.guess.deps"),"UTF-8")));
final PrintWriter goldDepPw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePrefix + ".kworst.gold.deps"),"UTF-8")));
System.out.printf("F1s of %d worst trees:\n",worstKTreesToEmit);