query.setRows(MAX_SUGGESTIONS * 3);
query.setFields(conceptUriField);
query.setIncludeScore(true);
try {
StreamQueryRequest request = new StreamQueryRequest(query);
QueryResponse response = request.process(solrServer);
SolrDocumentList results = response.getResults();
for (SolrDocument result : results.toArray(new SolrDocument[0])) {
String conceptUri = (String) result.getFirstValue(conceptUriField);
if (conceptUri == null) {
throw new ClassifierException(String.format(