<https://www.airliners.gr/community/threads/olympic-air-charters.8241/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/DiscussionForumPosting>
<https://www.airliners.gr/community/threads/olympic-air-charters.8241/#post-147849>