Complex sentence: At seventy-three minutes, "Bish Bosch" is Walker's longest studio album, as well as also containing his longest song, the twenty-one minute forty-one second "SDSS1416 +13B (Zercon, A Flagpole Sitter)".
Split into simpler sentences: At seventy-three minutes, "Bish Bosch" is Walker's longest studio album. It also contains his longest song, the twenty-one minute forty-one second "SDSS1416 +13B (Zercon, A Flagpole Sitter)".