<https://ielts.roadtoabroad.co.in/courses/ielts-ac-writing-task-1/lessons/bar-charts/#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ielts.roadtoabroad.co.in/courses/ielts-ac-writing-task-1/lessons/bar-charts/>