poet vs Calderon de la Barca

poet and Calderon de la Barca both are nouns.

Word	Noun	Adjective	Verb	Adverb
poet	Yes	No	No	No
Calderon de la Barca	Yes	No	No	No

poet (noun)	Calderon de la Barca (noun)
a writer of poems (the term is usually reserved for writers of good poetry)	Spanish poet and dramatist considered one of the great Spanish writers (1600-1681)