<https://whatsabyte.com/wp-content/uploads/Depositphotos_428250548_S-Captcha-i-am-not-a-robot.-Vector-illustration..jpg>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://whatsabyte.com/why-does-google-think-im-a-robot/>