diff --git a/dedoc/metadata_extractors/abstract_metadata_extractor.py b/dedoc/metadata_extractors/abstract_metadata_extractor.py
index e278d84a..602ee68e 100644
--- a/dedoc/metadata_extractors/abstract_metadata_extractor.py
+++ b/dedoc/metadata_extractors/abstract_metadata_extractor.py
@@ -31,13 +31,13 @@ def extract_metadata(self,
         """
         Extract metadata from file if possible, i.e. method :meth:`can_extract` returned True.
 
-        :type directory: path to the directory where the original and converted files are located
-        :type filename: name of the file after renaming (for example 23141.doc). \
+        :param directory: path to the directory where the original and converted files are located
+        :param filename: name of the file after renaming (for example 23141.doc). \
         The file gets a new name during processing by the dedoc manager (if used)
-        :type converted_filename: name of the file after renaming and conversion (for example 23141.docx)
-        :type original_filename: name of the file before renaming
-        :type parameters: additional parameters for document parsing
-        :type other_fields: other fields that should be added to the document's metadata
-        :return: document content with added metadata attribute (dict with information about the document)
+        :param converted_filename: name of the file after renaming and conversion (for example 23141.docx)
+        :param original_filename: name of the file before renaming
+        :param parameters: additional parameters for document parsing
+        :param other_fields: other fields that should be added to the document's metadata
+        :return: dict with metadata information about the document
         """
         pass
diff --git a/dedoc/metadata_extractors/metadata_extractor_composition.py b/dedoc/metadata_extractors/metadata_extractor_composition.py
index 874f0f75..e9c182d4 100644
--- a/dedoc/metadata_extractors/metadata_extractor_composition.py
+++ b/dedoc/metadata_extractors/metadata_extractor_composition.py
@@ -24,7 +24,7 @@ def extract_metadata(self,
                          parameters: Optional[dict] = None,
                          other_fields: Optional[dict] = None) -> dict:
         """
-        Add metadata to the document using one of the extractors if suitable extractor was found.
+        Extract metadata using one of the extractors if suitable extractor was found.
         Look to the method :meth:`~dedoc.metadata_extractors.AbstractMetadataExtractor.extract_metadata` of the class
         :class:`~dedoc.metadata_extractors.AbstractMetadataExtractor` documentation to get the information about method's parameters.
         """
diff --git a/docs/source/getting_started/usage.rst b/docs/source/getting_started/usage.rst
index d6c6c498..1114cb87 100644
--- a/docs/source/getting_started/usage.rst
+++ b/docs/source/getting_started/usage.rst
@@ -204,7 +204,7 @@ To extract metadata, one can add them to the document using :meth:`~dedoc.metada
 
 .. literalinclude:: ../_static/code_examples/dedoc_usage_tutorial.py
     :language: python
-    :lines: 77-83
+    :lines: 79-83
 
 As we see, the attribute ``metadata`` has been filled with some metadata fields.
 The list of common fields for any metadata extractor along with the specific fields
diff --git a/examples/create_unstructured_document.py b/examples/create_unstructured_document.py
index 59e4d02a..cf724e1a 100644
--- a/examples/create_unstructured_document.py
+++ b/examples/create_unstructured_document.py
@@ -58,8 +58,5 @@
 # HierarchyLevel(1, 1) for 1.
 # HierarchyLevel(1, 2) for 1.1.
 # HierarchyLevel(1, 4) for 1.2.1.1. and so on
-metadata = BaseMetadataExtractor().extract_metadata(directory="./",
-                                                    filename="example.docx",
-                                                    converted_filename="example.doc",
-                                                    original_filename="example.docx")
+metadata = BaseMetadataExtractor().extract_metadata(directory="./", filename="example.docx", converted_filename="example.doc", original_filename="example.docx")
 unstructured_document.metadata = metadata