<https://ru.wikihow.com/%D0%BF%D1%80%D0%B8%D0%B2%D1%8F%D0%B7%D0%B0%D1%82%D1%8C-%D0%BB%D0%BE%D0%B4%D0%BA%D1%83>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ru.wikihow.com/%D0%BF%D1%80%D0%B8%D0%B2%D1%8F%D0%B7%D0%B0%D1%82%D1%8C-%D0%BB%D0%BE%D0%B4%D0%BA%D1%83>