corrected bug on synonim missing for bioportal

nerBio.py

@@ -1534,14 +1534,22 @@ def getUrlBioAndAllOtherBioConcepts(word, args, key_virtuoso, cache_map_virtuoso
                     #             np.nan if x is None or (isinstance(x, float) and pd.isna(x)) else x))
                     #     ]
 
-                    df_expanded = df_expanded[
-                        df_expanded['prefLabel'].apply(
-                            lambda x: isinstance(x, str) and x.lower() == word.lower()
-                        ) |
-                        df_expanded['synonym'].apply(
-                            lambda x: isinstance(x, list) and any(item.lower() == word.lower() for item in x)
-                        )
-                        ]
+                    if 'prefLabel' in df_expanded.columns:
+                        if 'synonym' in df_expanded.columns:
+                            df_expanded = df_expanded[
+                                df_expanded['prefLabel'].apply(
+                                    lambda x: isinstance(x, str) and x.lower() == word.lower()
+                                ) |
+                                df_expanded['synonym'].apply(
+                                    lambda x: isinstance(x, list) and any(item.lower() == word.lower() for item in x)
+                                )
+                                ]
+                        else:
+                            df_expanded = df_expanded[
+                                df_expanded['prefLabel'].apply(
+                                    lambda x: isinstance(x, str) and x.lower() == word.lower()
+                                )
+                            ]
 
                     if df_expanded.empty:
                         # nothing found from Bioportal