Complex sentence: After a brief tenure as a member of the hip hop group I.D.U. (Intelligent, Deadly but Unique), D'Angelo signed a publishing deal with EMI Records in 1991 after catching the attention of record executives through a demo tape, which was originally by the group.
Split into simpler sentences: After a brief tenure as a member of the hip hop group I.D.U. (Intelligent, Deadly but Unique), D'Angelo signed a publishing deal with EMI Records in 1991. The singer-songwriter caught the attention of record executives through a demo tape, which originally by the group.