diff --git a/data/parsing_semantyczny.ipynb b/data/parsing_semantyczny.ipynb
new file mode 100644
index 0000000..3d6d370
--- /dev/null
+++ b/data/parsing_semantyczny.ipynb
@@ -0,0 +1,352 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "169e11e8-19c7-47ae-b8af-817e2e474ee7",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Overwriting book.jsgf\n"
+     ]
+    }
+   ],
+   "source": [
+    "%%writefile book.jsgf\n",
+    "#JSGF V1.0 UTF-8 pl;\n",
+    "\n",
+    "grammar book;\n",
+    "\n",
+    "public <rezerwuj> = chcialbym zarezerwowac stolik <dzien_rezerwacji> <godzina_rezerwacji> <liczba_osob> ;\n",
+    "\n",
+    "<dzien_rezerwacji> = na <dzien> {day};\n",
+    "\n",
+    "<dzien> = dzisiaj | jutro | poniedzialek | wtorek | srode | czwartek | piatek | sobote | niedziele;\n",
+    "\n",
+    "<godzina_rezerwacji> = na [godzine] <godzina_z_minutami> {hour};\n",
+    "\n",
+    "<godzina_z_minutami> = <godzina> [<minuty>];\n",
+    "\n",
+    "<godzina> = dziewiata | dziesiata | jedenasta | dwunasta;\n",
+    "\n",
+    "<minuty> = pietnascie | trzydziesci;\n",
+    "\n",
+    "<liczba_osob> = (na | dla) <liczba> {size} osob;\n",
+    "\n",
+    "<liczba> = dwie | dwoch | trzy | trzech | cztery | czterech | piec | pieciu;"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "88cc9879-a59c-4c90-adb6-1022c42913e6",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Overwriting order.jsgf\n"
+     ]
+    }
+   ],
+   "source": [
+    "%%writefile order.jsgf\n",
+    "#JSGF V1.0 UTF-8 pl;\n",
+    "\n",
+    "grammar order;\n",
+    "\n",
+    "public <zamow> = (chcialbym | chcialabym)  zamowic <danie> <stolik>;\n",
+    "\n",
+    "<danie> = <potrawa> {dish};\n",
+    "\n",
+    "<potrawa> = pizza peperoni | spaghetti carbonara | burger szefa;\n",
+    "\n",
+    "<stolik> = (do stolika | na stolik ) <numer_stolika> {stolik};\n",
+    "\n",
+    "<numer_stolika> = 100 | 101 | 102 | 103 | 104 | 105;"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "c5ffadfe-ea18-45ab-a9f9-b2cfd3c2fee7",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Overwriting recommend.jsgf\n"
+     ]
+    }
+   ],
+   "source": [
+    "%%writefile recommend.jsgf\n",
+    "#JSGF V1.0 UTF-8 pl;\n",
+    "\n",
+    "grammar recommend;\n",
+    "\n",
+    "public <polec_ogolny> = (jakie|jaki|jaka|jakiego) <jedzenie_napoj> polecasz;\n",
+    "\n",
+    "<jedzenie_napoj> = <jedzenie_napoj_opcje> {food_or_drink};\n",
+    "\n",
+    "<jedzenie_napoj_opcje> = jedzenia | picia | napoj | danie | dania;\n",
+    "\n",
+    "public <polec_danie> = ((jakie|jaki|jaka|jakiego)  <danie>) *;\n",
+    "\n",
+    "public <polec_napoj> = ((jakie|jaki|jaka|jakiego)  <napoj>) *;\n",
+    "\n",
+    "<danie> = <dania> {dish};\n",
+    "\n",
+    "<dania> = makarony | makaron | pizze | pizza | burgery | burger | salatki | salatka | deser | desery;\n",
+    "\n",
+    "<napoj> = <napoje> {drink};\n",
+    "\n",
+    "<napoje> = piwo | piwa | wino | wina | sok | soki | smoothie | kawe | kawy | kawe | herbate | herbata | herbaty;"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "57fb9886-0232-4dd9-b385-7cae1b068f6e",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Grammar(version=1.0, charset=UTF-8, language=pl, name=order)"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import jsgf\n",
+    "\n",
+    "book_grammar = jsgf.parse_grammar_file('book.jsgf')\n",
+    "order_grammar = jsgf.parse_grammar_file('order.jsgf')\n",
+    "recommend_grammar = jsgf.parse_grammar_file('recommend.jsgf')\n",
+    "order_grammar"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "8f5acde6-4f3c-425d-a202-f361b219922d",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[Rule(name='rezerwuj', visible=True, expansion=Sequence(Literal('chcialbym zarezerwowac stolik'), NamedRuleRef('dzien_rezerwacji'), NamedRuleRef('godzina_rezerwacji'), NamedRuleRef('liczba_osob')))]"
+      ]
+     },
+     "execution_count": 5,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "utterance = 'chcialbym zarezerwowac stolik na jutro na godzine dwunasta trzydziesci na piec osob'\n",
+    "matched = book_grammar.find_matching_rules(utterance)\n",
+    "if not matched:\n",
+    "    matched = order_grammar.find_matching_rules(utterance)\n",
+    "if not matched:\n",
+    "    matched = recommend_grammar.find_matching_rules(utterance)\n",
+    "matched"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "6cb7d2ba-d8ee-403a-bbf3-d7ea3e0475ba",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[Rule(name='zamow', visible=True, expansion=Sequence(ParsedAlternativeSet(Literal('chcialbym'), Literal('chcialabym')), Literal('zamowic'), NamedRuleRef('danie'), NamedRuleRef('stolik')))]"
+      ]
+     },
+     "execution_count": 6,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "utterance = 'chcialbym zamowic burger szefa do stolika 104'\n",
+    "matched = book_grammar.find_matching_rules(utterance)\n",
+    "if not matched:\n",
+    "    matched = order_grammar.find_matching_rules(utterance)\n",
+    "if not matched:\n",
+    "    matched = recommend_grammar.find_matching_rules(utterance)\n",
+    "matched"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "id": "371ee857-418d-4546-8e29-88b6c8706659",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[Rule(name='polec_danie', visible=True, expansion=KleeneStar(RequiredGrouping(Sequence(RequiredGrouping(ParsedAlternativeSet(Literal('jakie'), Literal('jaki'), Literal('jaka'), Literal('jakiego'))), NamedRuleRef('danie'))))),\n",
+       " Rule(name='polec_napoj', visible=True, expansion=KleeneStar(RequiredGrouping(Sequence(RequiredGrouping(ParsedAlternativeSet(Literal('jakie'), Literal('jaki'), Literal('jaka'), Literal('jakiego'))), NamedRuleRef('napoj')))))]"
+      ]
+     },
+     "execution_count": 7,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "utterance = 'jakie makarony polecasz'\n",
+    "matched = book_grammar.find_matching_rules(utterance)\n",
+    "if not matched:\n",
+    "    matched = order_grammar.find_matching_rules(utterance)\n",
+    "if not matched:\n",
+    "    matched = recommend_grammar.find_matching_rules(utterance)\n",
+    "matched"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "c914cc3d-b297-4e05-917c-6a2f09c0f8a9",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'act': 'recommend', 'slots': [('dish', 'makarony')]}"
+      ]
+     },
+     "execution_count": 8,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "def get_dialog_act(rule):\n",
+    "    slots = []\n",
+    "    get_slots(rule.expansion, slots)\n",
+    "    return {'act': rule.grammar.name, 'slots': slots}\n",
+    "\n",
+    "def get_slots(expansion, slots):\n",
+    "    if expansion.tag != '':\n",
+    "        slots.append((expansion.tag, expansion.current_match))\n",
+    "        return\n",
+    "\n",
+    "    for child in expansion.children:\n",
+    "        get_slots(child, slots)\n",
+    "\n",
+    "    if not expansion.children and isinstance(expansion, jsgf.NamedRuleRef):\n",
+    "        get_slots(expansion.referenced_rule.expansion, slots)\n",
+    "\n",
+    "get_dialog_act(matched[0])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "id": "91eaed10-e8c3-4429-a232-d317b84ec38f",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'act': 'book',\n",
+       " 'slots': [('day', 'jutro'), ('hour', 'dziesiata'), ('size', 'trzech')]}"
+      ]
+     },
+     "execution_count": 13,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "def nlu(utterance):\n",
+    "    matched = book_grammar.find_matching_rules(utterance)\n",
+    "    if not matched:\n",
+    "        matched = order_grammar.find_matching_rules(utterance)\n",
+    "    if not matched:\n",
+    "        matched = recommend_grammar.find_matching_rules(utterance)\n",
+    "\n",
+    "    if matched:\n",
+    "        return get_dialog_act(matched[0])\n",
+    "    else:\n",
+    "        return {'act': 'null', 'slots': []}\n",
+    "\n",
+    "nlu('chcialbym zarezerwowac stolik na jutro na godzine dziesiata dla trzech osob')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "id": "d85e8543-be59-4c5f-b9f9-27631a899c2a",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'act': 'recommend', 'slots': [('dish', 'makarony')]}"
+      ]
+     },
+     "execution_count": 14,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "nlu('jakie makarony polecasz')"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.10.0"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}