Complex sentence: ABBA also played six sold-out concerts, in one week in 1979 and one song from these concerts, "The Way Old Friends Do", is on their album, "Super Trouper".
Split into simpler sentences: ABBA also played six sold-out concerts, in one week in 1979. One song from these concerts, "The Way Old Friends Do", is on their album, "Super Trouper".