diff --git a/abl/abducer/abducer_base.py b/abl/abducer/abducer_base.py
index bd76831..cf14bb7 100644
--- a/abl/abducer/abducer_base.py
+++ b/abl/abducer/abducer_base.py
@@ -64,7 +64,7 @@ class AbducerBase(abc.ABC):
         score = 0
         for idx in range(len(pred_res)):
             address_idx = [i for i, flag in enumerate(all_address_flag[idx]) if flag != 0]
-            candidate = self.kb.address_by_idx([pred_res[idx]], key[idx], address_idx, True)
+            candidate = self.address_by_idx([pred_res[idx]], key[idx], address_idx)
             if len(candidate) > 0:
                 score += 1
         return score
@@ -72,7 +72,7 @@ class AbducerBase(abc.ABC):
     def _zoopt_address_score(self, pred_res, key, sol):
         if not self.multiple_predictions:
             address_idx = [idx for idx, i in enumerate(sol.get_x()) if i != 0]
-            candidates = self.kb.address_by_idx(pred_res, key, address_idx, self.multiple_predictions)
+            candidates = self.address_by_idx(pred_res, key, address_idx)
             return 1 if len(candidates) > 0 else 0
         else:
             return self._zoopt_score_multiple(pred_res, key, sol.get_x())
@@ -115,6 +115,9 @@ class AbducerBase(abc.ABC):
             key = tuple(key)
         self.cache_min_address_num[(tuple(pred_res), key)] = min_address_num
         self.cache_candidates[(tuple(pred_res), key, address_num)] = candidates
+        
+    def address_by_idx(self, pred_res, key, address_idx):
+        return self.kb.address_by_idx(pred_res, key, address_idx, self.multiple_predictions)
 
     def abduce(self, data, max_address_num=-1, require_more_address=0):
         pred_res, pred_res_prob, key = data
@@ -129,7 +132,7 @@ class AbducerBase(abc.ABC):
         if self.zoopt:
             solution = self.zoopt_get_solution(pred_res, key, max_address_num)
             address_idx = [idx for idx, i in enumerate(solution) if i != 0]
-            candidates = self.kb.address_by_idx(pred_res, key, address_idx, self.multiple_predictions)
+            candidates = self.address_by_idx(pred_res, key, address_idx)
             address_num = int(solution.sum())
             min_address_num = address_num
         else:
@@ -156,7 +159,6 @@ class AbducerBase(abc.ABC):
     def __call__(self, Z, Y, max_address_num=-1, require_more_address=0):
         return self.batch_abduce(Z, Y, max_address_num, require_more_address)
 
-
 if __name__ == '__main__':
     from kb import add_KB, prolog_KB, HWF_KB
     
diff --git a/abl/framework_hed.py b/abl/framework_hed.py
index a823b13..3f09ff6 100644
--- a/abl/framework_hed.py
+++ b/abl/framework_hed.py
@@ -158,7 +158,7 @@ def abduce_and_train(model, abducer, mapping, train_X_true, select_num):
         
         for idx in range(len(pred_res)):
             address_idx = [i for i, flag in enumerate(all_address_flag[idx]) if flag != 0]
-            candidate = abducer.kb.address_by_idx([pred_res[idx]], None, address_idx, True)
+            candidate = abducer.address_by_idx([pred_res[idx]], None, address_idx)
             if len(candidate) > 0:
                 consistent_idx_tmp.append(idx)
                 consistent_pred_res_tmp.append(candidate[0][0])