What is the name of this independent municipality that has an area less than 9 km and has the street of Vesterbrogade running through it?
Vesterbrogade: Vesterbrogade is the main shopping street of the Vesterbro district of Copenhagen, Denmark. Frederiksberg:  It is formally an independent municipality, Frederiksberg Municipality, but is typically treated as a part of Copenhagen. Frederiksberg:  It occupies an area of less than 9 km and had a population of 103,192 in 2015.
i don't know