Complex sentence: The opening ceremony called "Anstich," which is carried out by the City's Mayor, takes place in a different beer cellar every year, with thousands gathering to watch the opening spectacle with a huge fight for beer.
Split into simpler sentences: The opening ceremony called "Anstich", which is carried out by the City's mayor, takes place in a different beer cellar every year. Thousands gather to watch the opening spectacle with a huge fight for beer.