enable NED only usage of find-entities

cli.py

@@ -329,6 +329,18 @@ def find_entities(tsv_file, tsv_out_file, ner_rest_endpoint, ned_rest_endpoint,
 
             tsv, ner_result = ner(tsv, ner_rest_endpoint)
 
+        elif os.path.exists(tsv_file):
+
+            print('Using NER information that is already contained in file: {}'.format(tsv_file))
+
+            tmp = tsv.copy()
+            tmp['sen'] = (tmp['No.'] == 0).cumsum()
+
+            ner_result = [[{'word': row.TOKEN, 'prediction': row['NE-TAG']} for _, row in sen.iterrows]
+                          for _, sen in tmp.groupby('sen')]
+        else:
+            raise RuntimeError("Either NER rest endpoint or NER-TAG information within tsv_file required.")
+
         if ned_rest_endpoint is not None:
 
             tsv, ned_result = ned(tsv, ner_result, ned_rest_endpoint, json_file=ned_json_file, threshold=ned_threshold)