<https://superbilgiler.com/how-to-draw-a-seagull-simple-seagull-drawing-for-the-beginners>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://superbilgiler.com/how-to-draw-a-seagull-simple-seagull-drawing-for-the-beginners/>