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: "Doncaster iPort is connected to the rail network through the main line that is what length?" whose answer is 393 mi.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Doncaster iPort rail network length
Useful Output:

Doc 1: Located on a 30-acre site within the 337-acre iPort logistics hub, iPort Rail has storage capacity for 1,500 TEUs and a reach stacker operation
Doc 2: An average of 67 trains travel every day to and from London, the Azuma trains make the journey in just 87 minutes. Doncaster is home to two rail
Doc 3: The iPort Rail terminal opened in 2018, and it now has daily services running to and from Southampton, Felixstowe, Immingham and Teesport.
Doc 4: The terminal can handle up to six trains per a day with the maximum UK length of 775 m. It has an 800 m reception siding and two 400 m handling
Doc 5: iPort is one of the UK's most advanced multimodal logistics hub, with capacity for a total of 6 million sq ft of 24/7 of logistics and light