Complex sentence: Aberdeen is called the "Gateway to the Olympic Peninsula" and is best known for being the birthplace and hometown of Nirvana frontman Kurt Cobain and professional wrestler Bryan Danielson, better known by his ring name Daniel Bryan.
Split into simpler sentences: Aberdeen is called the "Gateway to the Olympic Peninsula". It has produced, but is perhaps best known for being the birthplace and hometown of Nirvana frontman Kurt Cobain and professional wrestler Daniel Bryan.