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: "The word qalat (kalata) is Persian and qal'at (qal‘a) is Arabic for 'fortified place', Qalats can range from castles like which location, to Adobe, a building material made from earth and often organic material?" whose answer is Rumkale.
Each document should contain about 30 words, and these documents should contain useful information.

Query: famous castles in Europe
Useful Output:

Doc 1: The Palace of Pena, Sintra Portugal · The Alcázar of Segovia, Spain · Castle of Astypalaia, Greece · Hohenwerfen Castle, Austria · Dunnottar Castle,
Doc 2: Famous Castles in Europe For Your Next Trip · Neuschwanstein Castle: Bavaria's Fairy Tale Dream · Pena Palace: A Romantic Architectural Fantasy.
Doc 3: A visit to Europe's most beautiful castles is a fairytale journey through time. From the majestic splendor of Neuschwanstein in Germany,
Doc 4: The 26 Most Beautiful Castles in Europe · Pena Palace, Portugal · Neuschwanstein Castle, Germany · Egeskov Castle, Denmark · Guaita Tower, San
Doc 5: Famous Castles & Royal Palaces You Can Visit or See in Europe · Palace of Versailles, Versailles, France · Buckingham Palace, London, UK · Neuschwanstein Castle