Complex sentence: BMG relocated the Windham Hill office to Los Angeles began distributing Windham Hill through RCA Records and merged other music labels that they purchased (such as Peter Baumann's Private Music) into Windham Hill, forming the Windham Hill Group.
Split into simpler sentences: BMG relocated the Windham Hill office to Los Angeles and began distributing Windham Hill through RCA Records. BMG merged other music labels that they purchased (such as Peter Baumann's Private Music) into Windham Hill, forming the Windham Hill Group.