urban center vs Sapporo

urban center and Sapporo both are nouns.

Word	Noun	Adjective	Verb	Adverb
urban center	Yes	No	No	No
Sapporo	Yes	No	No	No

urban center (noun)	Sapporo (noun)
a large and densely populated urban area; may include several independent administrative districts	a commercial city in northern Japan on western Hokkaido