Complex sentence: In 1988, Wakeman co-formed Anderson Bruford Wakeman Howe, which led to his return to Yes from 1990 to 1992; he returned twice after that, from 1995 to 1997 and 2002 to 2004.
Split into simpler sentences: In 1988, Wakeman co-formed Anderson Bruford Wakeman Howe, which led to his return to Yes from 1990 to 1992. He returned twice from 1995 to 1997 and 2002 to 2004.