From a0606c4749c8d2f1cf35e988e83b26d90d709c58 Mon Sep 17 00:00:00 2001
From: Jakub Henyk <jakhen@st.amu.edu.pl>
Date: Thu, 20 Apr 2023 23:55:09 +0200
Subject: [PATCH] Small fix

---
 system1.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/system1.py b/system1.py
index 3d34795..0832182 100644
--- a/system1.py
+++ b/system1.py
@@ -33,6 +33,8 @@ class DialogueStateTracker:
             self.state = "told_name"
         if any(item == "inform(rock_n_stone = True)" in user_act["type"] for item in user_act["type"]):
             self.state = "rock_n_stone"
+        if any(item == "null()" in user_act["type"] for item in user_act["type"]):
+            self.state = "unknown"
         
         return self.state