Complex sentence: Five Star is the name of a 1990 cult album by British pop group Five Star., although not an official UK release, it was released as a US only album, where sales were poor in comparison to earlier releases.
Split into simpler sentences: Five Star is the name of a 1990 cult album by the British pop group of the same name. The album was only released in the U.S. where sales were poor in comparison to earlier releases.