Complex sentence: Rosie Cross, living in Newtown, Australia, which is a suburb of Sydney who can be also known as Rosie X-is the founder of Geek girl, which is an popular Australian magazine and website that began in 1995.
Split into simpler sentences: Rosie Cross, living in Newtown, Australia, which is a suburb of Sydney. She can be also known as Rosie X, and is the founder of Geek girl, which is an popular Australian magazine and website that began in 1995.