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 did royal mail and post office split?" whose answer is 2013.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did royal mail and post office split
Useful Output:

Doc 1: The decision to separate the two in 1986 has now resulted in huge pressure on Post Offices, meaning longer queues for us all at Christmas, while Royal Mail
Doc 2: Ten years later the Postal Services Act 2011 was significant in that it led to the Post Office Ltd becoming independent of the Royal Mail Group
Doc 3: A brief history of national postal strikes · 1890 – the fight against split duties · 1964 – striking for better pay · 1971 – The Great Strike · 1988
Doc 4: The organisation was split into three separate businesses in 1986 – Royal Mail Letters, Parcels (later changed to Parcelforce) and Counters.
Doc 5: Royal Mail and the Post Office were legally separated in 2012 before Royal Mail's stock market flotation. It was agreed at the time that the