public static ArrayList<String> getCluster(String token) {
		if (singleton == null) {
			singleton = new BrownFeaturizer();
			singleton.init(new Model());
		}
		ArrayList<String> list = new ArrayList<String>();
		String cluster = singleton.mappingS.get(token);
		if (cluster == null) {
			cluster = "NONE";
		} else {
			for (int len : LEN) {
				if (cluster.length() >= len) {
					String pf = cluster.substring(0, len);
					list.add("CLUST_" + len + "_" + pf);
				}
			}
			list.add("CLUST_ALL_" + cluster);
		}
		return list;
	}