Question: How many number one singles as a solo artist does Mark Bryan's former band mate have?
Sentence (from "Darius Rucker discography"): His singles since 2008 have all been released to the country music format, where he has seven number-one singles: "Don't Think I Don't Think About It", "It Won't Be Like This for Long", "Alright", "Come Back Song", "This", "Wagon Wheel", and "If I Told You".
Relevant evidence: Yes