Complex sentence: He contributed his first ambient flute piece in eight years and he was in sparkling form once again; however, his health declined and his last album with the group was Strange Times to which he contributed his final compositions for the group'My Little Lovely'.
Split into simpler sentences: He contributed his first ambient flute piece in eight years and he was in sparkling form once again. However, his health declined and his last album with the group was Strange Times to which he contributed his final compositions for the group'My Little Lovely'.