<https://www.ebianch.com/lessons/servico-de-controle-de-aerodromo-twr/reg-mod-twr/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.ebianch.com/lessons/servico-de-controle-de-aerodromo-twr/reg-mod-twr/>