Complex sentence: The Simply Deeper Tour was a 2003 European concert tour by American pop/R&B singer Kelly Rowland, to help promote her debut solo album "Simply Deep".
Split into simpler sentences: The Simply Deeper Tour was the debut concert tour by American R&B recording artist Kelly Rowland. This was Rowland's first concert tour as a solo artist and it was used to promote her debut solo studio album, "Simply Deep".