You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "What English television presenter originally hosted the British television and radio talent show Opportunity Knocks?" whose answer is Hugh Hughes Green.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Opportunity Knocks original host
Useful Output:

Doc 1: Episode 13. A surprise $30,000 poses the questions, how can the six families reach beyond their original goals? Opportunity Coaches and host Ronaldo Hardy meet
Doc 2: Coined by Mastermind presenter Magnus Magnusson, the phrase is uttered if the buzzer sounds half-way through a question at the end of a round.
Doc 3: The 1956 one-off series of Opportunity Knocks. Just four days after the start of Independent Television in Britain, Hughie Green was hosting a
Doc 4: Opportunity Knocks with Hughie Green at the helm ran until 1977. Revamped in 1987 it ran for another 3 series first with Bob Monkhouse as host (
Doc 5: Host. Hughie Green (1949-78). Bob Monkhouse (1987-9). Les Dawson (1990). Broadcast. BBC Light Programme (radio), 18 February to 29 September