test3.add(new Event("syntax", null));
test3.add(new Event("was", null));
test3.add(new Event("white", null));
test3.add(new Event("as", null));
test3.add(new Event("snow.", null));
unknown.addEvents(test3);
List<Document> knowns = new ArrayList<Document>();
Document knownDocument1 = new Document();
knownDocument1.setAuthor("Mary");
knownDocument1.addEventSet(null, known1);