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 town is closest to the castle once owned by the Scottish inventor who invented a military cannon described by Isaac Newton as "destructive to the human species"?" whose answer is Aberchirder, Aberdeenshire, Scotland.
Each document should contain about 30 words, and these documents should contain useful information.

Query: castle once owned by John Napier in Scotland
Useful Output:

Doc 1: He purchased a castle of his own in the hamlet of Gartness, where he lived with his wife Elizabeth. There he focused on agriculture, tending to
Doc 2: The castle was probably built in 1454 on lands acquired by the Napier family before 1438. Over the centuries it was remodeled and added onto, so
Doc 3: In Napier s own time, Graigmillar Castle and Merchiston Castle were the two strongest places in the neighbourhood of Edinburgh. Sir Archibald Napier, the father
Doc 4: Napier also spelled: Neper ; Born: 1550, Merchiston Castle, near Edinburgh, Scotland ; Died: April 4, 1617, Merchiston Castle (aged 67).
Doc 5: John Napier, Laird of Merchiston, born 1550, Merchiston Castle, Edinburgh, Scotland; died April 3, 1617, Edinburgh, Scotland; developer of logarithms.