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 is the name of the actor who played the role of the person who is Keeper of Keys and Grounds of Hogwarts in "Harry Potter" films?" whose answer is Robbie Coltrane.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who played the Keeper of Keys and Grounds of Hogwarts in Harry Potter films
Useful Output:

Doc 1:  Harry Potter Fan Club and get sorted into your Hogwarts house, let the wand choose you and discover your Patronus at http://wizardingworld.com/
Doc 2: Sean of the Dead's Nick Frost has been cast as the lovable Rubyus Hagrid. Keeper of Keys and Grains at Hogwarts. Newcomer Luke Allen will play
Doc 3:  Hogwarts, and will play the half-giant Rubeus Hagrid, the Keeper of the Keys and Grounds at the wizarding school. Nick Frost is reportedly
Doc 4: Rubeus Hagrid is more than just the Keeper of Keys and Grounds—he is a symbol of loyalty, kindness, and the beauty of finding joy in the
Doc 5: Rubeus Hagrid shouldered two major responsibilities before becoming a teacher: Keeper of Keys and Groundskeeper. The keeper of Keys seems