question: What English television presenter originally hosted the British television and radio talent show Opportunity Knocks?
answer: Hugh Hughes Green
context: Title: Opportunity Knocks (UK TV series)
  Passage: Opportunity Knocks is a British television and radio talent show originally hosted by Hughie Green, with a late-1980s revival hosted by Bob Monkhouse, and later by previous winner Les Dawson.
  Title: Grace Kennedy (singer)
  Passage: Grace Kennedy is a British singer and television presenter who was born at Montego Bay, Jamaica on 2 March 1958.  She first came into the public eye after winning TV talent show Opportunity Knocks.  She was subsequently signed up by the BBC to present her own Saturday night prime time entertainment show, The Grace Kennedy Show, which ran for six series from 1981–1983.  Guests on the show included Bruce Forsyth and Derek Griffiths.  She has also appeared on The Royal Variety Performance, Live From Her Majesty's, and Magnum, PI.  Grace starred in the 2005 UK production of Thoroughly Modern Millie alongside Lesley Joseph, Elaine C Smith and Donna Steele.
  Title: Mike Doyle (comedian)
  Passage: Mike Doyle is a British comedian, vocalist and broadcaster from Carmarthen, Wales, but is now based in nearby Bridgend.  Doyle made his debut television back in 1988, winning the BBC One talent show "Opportunity Knocks".
  Title: Hughie Green
  Passage: Hugh Hughes Green (2 February 1920 – 3 May 1997) was an English television presenter.
citations: Hughie Green Opportunity Knocks (UK TV series)