<https://abcsofliteracy.com/there-was-an-old-lady-who-swallowed-the-abcs-letter-recognition-activity/oldlady/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://abcsofliteracy.com/there-was-an-old-lady-who-swallowed-the-abcs-letter-recognition-activity/oldlady/>