A Microdata/RDFa example had two itemprop/property elements on the same element, one of which contained an invalid property value (Fiction).
I guess it was intended to use content="Fiction" instead, but note that Microdata doesn’t allow this on span (see #184) and the JSON-LD example uses "fictional" instead of "Fiction", too.
Fixed 'Book' example
An example had two itemprop/property elements on the same element, one of which contained no valid property.
Thanks! Merged in via #272 (I pulled it into sdo-stantz, our upcoming release, rather than master branch).