<https://fornote.net/2017/05/mozilla-ostaetsya-s-thunderbird-no-menyaet-otnoshenie-k-nemu/#breadcrumblist>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://fornote.net/2017/05/mozilla-ostaetsya-s-thunderbird-no-menyaet-otnoshenie-k-nemu/>