Figure 4 - Examples of References between Objects

To me it feels somewhat strange to use an “organizes” reference between “Farmers” and “Joe”/”Sam” while at the same time “hasClassification” is used between “Animals” and “Dogs”/”Cats”. It is not wrong, but unclear to the reader if this is on purpose or accidental.

My proposals:
1.1 replace “organizes” by “hasClassification” OR explicitly clarify in the text that this example is meant to illustrate that it is no problem to use a mix of Reference-SuperTypes (Organizes) and Reference-Subtypes (HasClassification/Owns).
1.2 use singular instead of plural in Object names, i.e. “Farmer” instead of “Farmers”, “Animal” instead of “Animals”, “Dog” instead of “Dogs”, “Cat” instead of “Cats”