Put N over the noun, AR over the article, AD over the adjectives, and PA over the predicate adjective.

The museum's coin collection is impressive.

N - Museum

AR - the

AD - impressive

PA - impressive

Explanation:

Noun is the name of a thing, place, person, or animal. 'The museum's coin collection is impressive' here, 'museum' is the noun which describes a place.

Articles are: the, a, an. So in the given sentence, 'the' is an article.

Adjectives are the describing words, ones which describes the nouns or pronoun. The word 'impressive' is an adjective which describes the collection of coins in the museum.

Predicate adjective is same as adjective which follows the linking verb and which in turn describes the subject of the linking verb. 'The museum's coin collection is impressive' here, the linking verb is, 'is' and the predicate adjective is 'impressive.'