Question: Tommy Cannon (born Thomas Derbyshire, 27 June 1938) and which English comedian, actor and singer, known collectively as Cannon and Ball, are an English comedy double act best known for their comedy variety show "?The Cannon and Ball Show", which lasted for nine years on ITV?
Sentence (from "Bobby Ball"): Robert Harper, known professionally as Bobby Ball (born 28 January 1944), is an English comedian, actor and singer.
Relevant evidence: Yes