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: "when does world cup start and end 2018?" whose answer is 14 June to 15 July.
Each document should contain about 30 words, and these documents should contain useful information.

Query: 2018 World Cup start and end dates
Useful Output:

Doc 1: The group stage kicks off on June 14 and matches continue through the final on July 15. All times listed are in ET. Group Stage. Thursday, June
Doc 2: FIFA World Cup 2018 fixtures: Matches, dates, groups and venues in our full schedule | London Evening Standard | The Standard.
Doc 3: The FIFA World Cup 2018 (21st FIFA World Cup) is scheduled to be held in Russia from June 14 to July 15, 2018. Russia was awarded the hosting
Doc 4: The 2018 World Cup starts officially starts on the 14th of June with the opening ceremony occurring just before the first match which will include the hosts
Doc 5: This year's action kicks off Thursday, June 14, when hosts Russia take on Saudi Arabia in Moscow. Eventually, after 64 matches played across 11