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 building in the London Docklands lays claim to being the site of the oldest riverside tavern?" whose answer is Prospect of Whitby.
Each document should contain about 30 words, and these documents should contain useful information.

Query: oldest riverside tavern London Docklands
Useful Output:

Doc 1: St Katharine's Docks followed the London Docks in Wapping and opened in 1828.  It claims to be the oldest riverside tavern in London. prospect
Doc 2: Prospect of Whitby, built in1520, is the oldest riverside tavern. All sorts of people from sailors, smugglers and cut throats to British movie
Doc 3: There has been a pub on this site near Canary Wharf for over 250 years. It is named after the cannon which was fired to celebrate the opening of
Doc 4: The Prospect of Whitby, built around 1520, is said to be London's oldest riverside pub. The outside of the pub was covered in a beautiful floral display.
Doc 5: It lays claim to being the site of the oldest riverside tavern in London, dating from around 1520.  Execution Dock was actually by Wapping Old