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: "who is the most successful club in spain?" whose answer is Real Madrid.
Each document should contain about 30 words, and these documents should contain useful information.

Query: most successful football club in spain
Useful Output:

Doc 1: MOST SUCCESSFUL CLUBS FROM SPAIN THIS VIDEO CONTAINS THE MOST SUCCESSFUL CLUBS FROM SPAIN. CLUBS WITH MOST TROPHIES IN SPAIN.
Doc 2: La Liga teams Barcelona, Valencia, & Athletic Club are among the most successful in Spanish football history, alongside Real Madrid.
Doc 3: As they say, the rest is history. 'Royal Madrid' truly are the kings of football. It is not only the most successful club in Spain, but in the
Doc 4: Real Madrid is not just the most successful football club in Spain but also one of the most successful clubs in world football. Founded in 1902
Doc 5: 1. Real Madrid CF (Spain) – 103 Trophies · You May Also Like · The 20 Best-Paid Manchester City Players Ranked from Lowest to Highest (Updated).