<http://schema.org/keywords>
"unit.a"^^<http://www.w3.org/2001/XMLSchema#string>
<https://bangordailynews.com/2014/03/12/living/brunswick-company-to-reproduce-robert-mccloskey-watercolors-from-books-such-as-blueberries-for-sal-one-morning-in-maine/>