diff --git a/Untitled.ipynb b/Untitled.ipynb
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+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "9048d286-415f-4a33-be3a-9d7099aa85de",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import pandas as pd\n",
+    "from config_jingbo import *"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 19,
+   "id": "07e338e7-1dd1-417f-b4e2-65d0efc983d6",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "df = pd.read_csv(os.path.join(dataset,'last_update_times.csv'))\n",
+    "df = df.sort_values(by=['warning_date'], ascending=[False])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 33,
+   "id": "659eec10-f0b8-4d65-b70e-6f07f45291bc",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "y_last_update_time = df[df['feature']=='y']['warning_date'].values[0]\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 49,
+   "id": "31035e6f-36e8-4b17-a14b-f7dd79ae085a",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "
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+       "\n",
+       "
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+       "  \n",
+       "    \n",
+       "      | \n",
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+       " | feature\n",
+       " | 
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73 rows × 2 columns
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+       "