Answer:
Common nouns: train, sun, superhero, planet, kitchen, animal, car, boy, pig, secretary, pen, airline
Proper nouns: California, Park Avenue, Sun, John, Jupiter, Toyota, Europe, Batman, Egypt, Disneyland, November, Atlantic Ocean, K-mart
Step-by-step explanation:
Common nouns are used to name any person, place, thing, or idea. In this case, the named entity is generic. For example, the word planet is a common noun. These nouns are not capitalized unless they are the first word of the sentence.
Proper nouns name of specific people, places, things, or ideas. For example, Jupiter, which is a specific planet, is a proper noun. Unlike common nouns, proper nouns are always be capitalized.
However, some nouns can be both common and proper depending on the context. An example of such a noun is sun. Just like the words moon and earth, sun isn't capitalized unless it's used in the astronomical context.