Complex sentence: In 1989 they performed a one-off gig and a short time later began writing together again, producing two albums in the 1990s, "SHANGHAI" (1993) and "Heartland" (1997).
Split into simpler sentences: In 1989 they performed a one-off gig and a short time later began writing together again producing two albums in the 1990s. These two albums were "Shanghai" (1993) and "Heartland" (1997).