<https://www.coursera.org/lecture/forensic-science/week-7-5-forensic-toxicology-4WTFe#lecture>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.coursera.org/lecture/forensic-science/week-7-5-forensic-toxicology-4WTFe>