Complex sentence: However Priisholm finally left the band, leaving Fielfraz as a trio, that all appeared on the album "Hempler" which instead of following under the Fielfraz moniker, introduced Claus Hempler as a solo artist in 2004, and gave him a magnificient comeback.
Split into simpler sentences: However Priisholm finally left the band, leaving Fielfraz as a trio, that all appeared on the album "Hempler". However instead of following under the Fielfraz moniker, the album introduced Claus Hempler as a solo artist in 2004, and gave him a magnificient comeback.