diff --git a/prepare_dataset.ipynb b/prepare_dataset.ipynb
index 9560a4b..e9a60ed 100644
--- a/prepare_dataset.ipynb
+++ b/prepare_dataset.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 91,
+   "execution_count": 108,
    "id": "93809ffc",
    "metadata": {},
    "outputs": [
@@ -174,7 +174,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 92,
+   "execution_count": 109,
    "id": "48724594",
    "metadata": {},
    "outputs": [
@@ -239,7 +239,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 93,
+   "execution_count": 110,
    "id": "e1f793b6",
    "metadata": {},
    "outputs": [],
@@ -259,7 +259,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 94,
+   "execution_count": 111,
    "id": "1652a78e",
    "metadata": {},
    "outputs": [],
@@ -295,7 +295,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 112,
    "id": "f523dd58",
    "metadata": {},
    "outputs": [],
@@ -341,7 +341,7 @@
     "                line_text += text\n",
     "            \n",
     "            line_text = line_text.strip()\n",
-    "            line_text = re.sub(r\"[•▪◦●❖▶■]\", \"\", line_text)\n",
+    "            line_text = re.sub(r\"[•▪◦●❖▶■\\uf000-\\uf0ff]\", \"\", line_text)\n",
     "            \n",
     "            if not line_text:\n",
     "                continue\n",
@@ -415,7 +415,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 96,
+   "execution_count": 113,
    "id": "9f64a8c0",
    "metadata": {},
    "outputs": [],
@@ -428,7 +428,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 97,
+   "execution_count": 114,
    "id": "41e4651d",
    "metadata": {},
    "outputs": [],