diff --git a/forte_wrapper/allennlp/allennlp_processors.py b/forte_wrapper/allennlp/allennlp_processors.py
index e59f347..55a2eb9 100644
--- a/forte_wrapper/allennlp/allennlp_processors.py
+++ b/forte_wrapper/allennlp/allennlp_processors.py
@@ -15,7 +15,7 @@
 import itertools
 import logging
 import more_itertools
-from typing import Dict, List
+from typing import Any, Dict, List
 
 from allennlp.predictors import Predictor
 
@@ -138,16 +138,19 @@ def _process(self, input_pack: DataPack):
         # handle existing entries
         self._process_existing_entries(input_pack)
 
-        batch_size = self.configs['infer_batch_size']
+        batch_size: int = self.configs['infer_batch_size']
         if batch_size <= 0:
             batches = iter([input_pack.get(Sentence)])
         else:
             batches = more_itertools.ichunked(input_pack.get(Sentence),
                                               batch_size)
         for sentences in batches:
-            inputs = [{"sentence": s.text} for s in sentences]
-            results = {k: p.predict_batch_json(inputs)
-                       for k, p in self.predictor.items()}
+            inputs: List[Dict[str, str]] = [{"sentence": s.text}
+                                            for s in sentences]
+            results: Dict[str, List[Dict[str, Any]]] = {
+                k: p.predict_batch_json(inputs)
+                for k, p in self.predictor.items()
+            }
             for i, sentence in enumerate(sentences):
                 result: Dict[str, List[str]] = {}
                 for key in self.predictor.keys():