Question: How many sons did "The Hitman"'s father have?
Sentence (from "Hart wrestling family"): An amateur and professional wrestling performer, promoter and trainer, Stu not only owned and operated his own wrestling promotion, Stampede Wrestling, but also trained some of the most well known and successful stars in wrestling history including Superstar Billy Graham, Fritz Von Erich, Edge, Chris Jericho, Chris Benoit, Christian and his sons Bret Hart and Owen Hart.
Relevant evidence: No