diff --git a/example_nlu.py b/example_nlu.py
index 3181185..2265a35 100644
--- a/example_nlu.py
+++ b/example_nlu.py
@@ -1,44 +1,44 @@
-import jsgf
-from pathlib import Path
-import os
-
-__location__ = Path().resolve()
-
-book_grammar = jsgf.parse_grammar_file(os.path.join(__location__, "grammar3.jsgf"))
-book_grammar
-
-
-def get_dialog_act(rule):
-    slots = []
-    get_slots(rule.expansion, slots)
-    return {'act': rule.grammar.name, 'slots': slots}
-
-def get_slots(expansion, slots):
-    if expansion.tag != '':
-        slots.append((expansion.tag, expansion.current_match))
-        return
-
-    for child in expansion.children:
-        get_slots(child, slots)
-
-    if not expansion.children and isinstance(expansion, jsgf.NamedRuleRef):
-        get_slots(expansion.referenced_rule.expansion, slots)
-
-def nlu(utterance):
-    matched = book_grammar.find_matching_rules(utterance)
-
-    if matched:
-        return get_dialog_act(matched[0])
-    else:
-        return {'act': 'null', 'slots': []}
-
-
-
-utterance = 'jakie napoje gazowane'.lower()
-matched = book_grammar.find_matching_rules(utterance)
-
-print(matched)
-
-nlu(utterance)
-
+import jsgf
+from pathlib import Path
+import os
+
+__location__ = Path().resolve()
+
+book_grammar = jsgf.parse_grammar_file(os.path.join(__location__, "grammar3.jsgf"))
+book_grammar
+
+
+def get_dialog_act(rule):
+    slots = []
+    get_slots(rule.expansion, slots)
+    return {'act': rule.grammar.name, 'slots': slots}
+
+def get_slots(expansion, slots):
+    if expansion.tag != '':
+        slots.append((expansion.tag, expansion.current_match))
+        return
+
+    for child in expansion.children:
+        get_slots(child, slots)
+
+    if not expansion.children and isinstance(expansion, jsgf.NamedRuleRef):
+        get_slots(expansion.referenced_rule.expansion, slots)
+
+def nlu(utterance):
+    matched = book_grammar.find_matching_rules(utterance)
+
+    if matched:
+        return get_dialog_act(matched[0])
+    else:
+        return {'act': 'null', 'slots': []}
+
+
+
+utterance = 'jakie napoje gazowane'.lower()
+matched = book_grammar.find_matching_rules(utterance)
+
+print(matched)
+
+nlu(utterance)
+
 print(get_dialog_act(matched[0]))
\ No newline at end of file