unknown.addEvent(new Event("white", null));
unknown.addEvent(new Event("as", null));
unknown.addEvent(new Event("snow.", null));
List<Document> knowns = new ArrayList<Document>();
Document knownDocument1 = new Document();
<BUG>knownDocument1.setAuthor(known1.getAuthor());
knownDocument1.addEventSet(null, known1);</BUG>
knowns.add(knownDocument1);
Document knownDocument2 = new Document();
<BUG>knownDocument2.setAuthor(known2.getAuthor());
</BUG>
knownDocument2.addEventSet(null, known2);

unknown.addEvent(new Event("white", null));
unknown.addEvent(new Event("as", null));
unknown.addEvent(new Event("snow.", null));
List<Document> knowns = new ArrayList<Document>();
Document knownDocument1 = new Document();
knownDocument1.setAuthor("Mary");
knownDocument1.addEventSet(null, known1);
knowns.add(knownDocument1);
Document knownDocument2 = new Document();
knownDocument2.setAuthor("Peter");
knownDocument2.addEventSet(null, known2);
