In notebook 11, when I follow the link to dbpedia.org at the end, I get a "high risk website" warning on Firefox as it doesn't by default switch to https.
In notebook 12, the URN www.turing.ac.uk/rsd-engineering/ontologies/reactions/ gets rendered as a hyperlink that goes nowhere (I think it should be escaped like above)
www.turing.ac.uk/rsd-engineering/ontologies/reactions/
gets rendered as a hyperlink that goes nowhere (I think it should be escaped like above)