diff --git a/third_party/src/main/java/com/github/datquocnguyen/FWObject.java b/third_party/src/main/java/com/github/datquocnguyen/FWObject.java
index 4d89465d..9017f23a 100644
--- a/third_party/src/main/java/com/github/datquocnguyen/FWObject.java
+++ b/third_party/src/main/java/com/github/datquocnguyen/FWObject.java
@@ -36,4 +36,13 @@ public class FWObject
 			context = new String[13];
 		}
 	}
+
+	public void reset(boolean check) {
+		if (check) {
+			System.arraycopy(contextPrototype, 0, context, 0, 13);
+		}
+		else {
+			Arrays.fill(context, null);
+		}
+	}
 }
diff --git a/third_party/src/main/java/com/github/datquocnguyen/RDRPOSTagger.java b/third_party/src/main/java/com/github/datquocnguyen/RDRPOSTagger.java
index e51f44ec..a0bea5b2 100644
--- a/third_party/src/main/java/com/github/datquocnguyen/RDRPOSTagger.java
+++ b/third_party/src/main/java/com/github/datquocnguyen/RDRPOSTagger.java
@@ -103,8 +103,10 @@ public class RDRPOSTagger
 		var initialTags = InitialTagger.EnInitTagger4Sentence(FREQDICT, sentence);
 
 		String[] tags = new String[initialTags.length];
+		FWObject object = new FWObject(true);
+
 		for (int i = 0; i < initialTags.length; i++) {
-			FWObject object = Utils.getObject(sentence, initialTags, initialTags.length, i);
+			Utils.getObject(object, sentence, initialTags, initialTags.length, i);
 			tags[i] = findFiredNode(object).conclusion;
 		}
 
diff --git a/third_party/src/main/java/com/github/datquocnguyen/Utils.java b/third_party/src/main/java/com/github/datquocnguyen/Utils.java
index e422b5ad..4cd91d58 100644
--- a/third_party/src/main/java/com/github/datquocnguyen/Utils.java
+++ b/third_party/src/main/java/com/github/datquocnguyen/Utils.java
@@ -123,9 +123,9 @@ public class Utils
 		return condition;
 	}
 
-	public static FWObject getObject(String[] words, String[] tags, int size, int index)
+	public static FWObject getObject(FWObject object, String[] words, String[] tags, int size, int index)
 	{
-		FWObject object = new FWObject(true);
+		object.reset(true);
 
 		if (index > 1) {
 			object.context[4] = words[index-2];
@@ -175,9 +175,7 @@ public class Utils
 			else
 				return "<T>";
 		}
-		String conclusion = str.substring(str.indexOf("\"") + 1,
-			str.length() - 1);
-		return conclusion;
+		return str.substring(str.indexOf("\"") + 1, str.length() - 1);
 	}
 
 	public static void main(String[] args)