Complex sentence: HEOS ™ by Denon-In July 2015, HEOS ™ by Denon announced its new partnership with Rdio, representing a significant addition to the growing roster of music streaming services available through HEOS.
Split into simpler sentences: HEOS ™ by Denon-In July 2015, HEOS ™ by Denon announced its new partnership with Rdio. It is a significant addition to the growing roaster of music streaming services available through HEOS.