What is the example of term with comprehension and extension?

In semantics, the term "dog" can be used to illustrate comprehension and extension. The comprehension of "dog" refers to the characteristics and qualities that define what a dog is, such as being a domesticated animal, typically with fur, four legs, and the ability to bark. The extension of "dog," on the other hand, includes all the individual dogs that exist or have existed, such as a Labrador Retriever named Max or a Beagle named Bella. Together, comprehension captures the essence of the concept, while extension encompasses the actual instances of that concept.