Simplify the following text for a Grade 4 native English-speaking person.
Original: Backed up by the mayor and a vast majority of Ancona supporters , Piano switched their denomination to U.S. Ancona 1905 and started the 2010 â `` 11 season in Eccellenza .
Simplified: By the summer 2010 the new club of the city is the U.S. Ancona 1905 . It play in Eccellenza Marche .