make backwards compatible by having ? and nan in actor analysis as well

Co-authored-by: Erik Tjong Kim Sang <[email protected]>

orangecontrib/storynavigation/modules/actoranalysis.py

@@ -102,8 +102,8 @@ def __do_custom_tagging(self, df, cust_tag_cols):
 
         for index, row in df_filtered.iterrows():
             current_row_ents = []
-            for col in cust_tag_cols:                
-                if not pd.isna(row[col]) and (row[col] != '?'): # was '!= 'nan'
+            for col in cust_tag_cols:
+                if not pd.isna(row[col]) and (row[col] not in ['?', 'nan']):
                     current_row_ents.append({"start": int(row['token_start_idx']), "end": int(row['token_end_idx']), "label": row[col]})                    
 
             # Convert each dictionary to a tuple of (key, value) pairs