@Override
public void read(InputStream in, String baseURI, ContentType ct, final StreamRDF output,
Context context) {
try {
final Object jsonObject = JSONUtils.fromInputStream(in);
final JSONLDTripleCallback callback = new JSONLDTripleCallback() {
@Override
// public Object call(Map<String, Object> dataset) {
public Object call(RDFDataset dataset) {
for (final String gn : dataset.keySet()) {