In the original publication of this article (Smith, Reference Smith2021), a production error caused some of the Examples to be misnumbered. The correct numbering is as follows:
• The two examples given on the eighth page of the article are examples (4) and (5).
• The examples given on the ninth page of the article are, in order, examples (6), (7), (8), (9), (10), and (11).
The other examples are correctly numbered in the original article.
The publisher sincerely apologizes for this error, which was not the fault of the author.