Complex sentence: A total of fourty-two official remix versions of "I Walk Alone" were released by Warner Bros. in order to promote the song in dance clubs, which is the highest number of remixes for any Cher song.
Split into simpler sentences: A total of fourty-two official remix versions of "I Walk Alone" have been released by Warner Bros. in order to promote the song in dance clubs. That is the highest number of remixes for any Cher song.